JP6131032B2 - Men's underwear - Google Patents

Description

  The present invention provides a male undergarment in which an outerwear such as pants is not soiled even when urine remaining in the urethra is dripped in the undergarment when the local is stored in the undergarment after the male urinates in a standing position. About.

  In Japan, where the birthrate is declining and the population is aging, it is predicted that 1 in 4 people will become elderly in 2020. Among the bodily functions that decline with age, there are very many people who have problems with urinary incontinence or urine leakage. In the case of women, the number of people who suffer from urinary incontinence or urine leakage tends to increase with age. Conventionally, as a solution to this, people who have a small amount of urine leakage who are living normally (light incontinence) have responded with incontinence pants like a thick cloth with a waterproof cover, and a large amount of urine leakage People (light incontinence to medium incontinence) have dealt with paper diapers or attached paper pads to diaper covers. The degree of urine leakage varies greatly between individuals, and various products (including nursing care products) are on the market.

  On the other hand, even in healthy people, even if it is a healthy person, it is a mild symptom in which a smaller amount of urine oozes than light incontinence. When you start walking away from the urinal by closing the outer zipper of the trousers, etc., storing the local area, the urine may ooze out gradually or gently. As aging progresses (for example, after the mid-50s), the tendency of urine remaining in the urethra to drop after urination increases. This is said to be caused by a decrease in the contractile function of the cavernous muscle that surrounds the urethra. Although the degree of dripping after urination is as great as individual urinary incontinence or urine leakage, it is said to be about 1 to 2 ml, less than the amount of urine (5 to 10 ml) in the case of light incontinence.

  Such dripping after urination is not a disease because of the small amount of urine, unlike the urinary incontinence and leakage of urine described above. However, there are many healthy men who suffer from such symptoms of dripping after urination, including potential people. Many men who suffer from such symptoms will respond by wearing incontinence pants as disclosed in JP 2011-179139 A (Patent Document 1), for example.

The wearing feeling of the incontinence pants disclosed in Patent Document 1 is greatly different from pants having a good wearing feeling as shown in, for example, Japanese Patent Laid-Open No. 10-183401 (Patent Document 2), and a preferable wearing feeling is obtained. Absent.
For this reason, in order to solve the problem of dripping after urination with a good feeling of wearing, the pants having a comfortable altitude shape as disclosed in Patent Document 2 have a substantially almond-shaped plan view disclosed in Patent Document 1. A urine absorbing sheet may be provided.

JP 2011-179139 A JP-A-10-183401

  However, in the incontinence pants disclosed in Patent Document 1, when the urine absorption pad is attached to the incontinence pant main part, the urine absorption pad is used during the sewing of the main part of the pant, the front part, the left and right front bodies, and the rear. After sewing with the body, it is sewn between the left and right front bodies on the inner surface of the front part. If sewn in this manner, urine may propagate from the perforated holes and / or stitches of the sewing machine and ooze out to the front side of the incontinence pants (that is, the pants side which is the outer).

Furthermore, when the urine absorbing sheet having a substantially almond shape in plan view disclosed in Patent Document 1 is applied to the pants disclosed in Patent Document 2, the feeling of wear is improved in addition to the problem of perforated holes and / or stitches in the sewing machine. The suturing position of the front side crotch portion and the front center fabric forming the bulging portion for causing the connection (the connecting sewn portion 40 shown in FIG. 1 of Patent Document 2) is located in the vicinity of the external urethral opening, When urine oozes out after urination, urine may propagate from the perforated hole and / or seam of the sewing machine at the stitching position and ooze out to the front side of the pants (that is, the outer pants side).

Thus, even if the wearing feeling of the incontinence pants can be improved, urine dropped after urination may ooze out from the perforation hole or stitch of the sewing line of the suture line to the outer.
The present invention has been developed in view of such problems, and it is different from the incontinence pants worn by sick people, and is a normal underwear that is comfortable to wear, and there is dripping after urination The purpose is to provide men's underwear for healthy men that does not ooze out and get dirty in outerwear such as pants.

In order to achieve the above object, the men's underwear according to the present invention employs the following technical means.
That is, the male undergarment according to the aspect of the present invention is a male undergarment in which a body cloth part covering the buttock and the side part, a waist rubber part, and a plait part having a bulging part for storing a local part are sewn together. The suture line intersecting with the straight line drawn downward from the approximate center of the placket is not visible in the abdominal plan view of the male underwear placed on a flat surface. .

Preferably, a crotch fabric is disposed between the back crotch portion of the body fabric portion and the abdominal crotch portion of the placket portion, and the placket portion and the crotch fabric fabric are an integrated fabric. It can be configured to be.
More preferably, a crotch fabric is disposed between the back crotch portion of the body fabric portion and the ventral crotch portion of the placket portion, and the placket portion and the crotch fabric fabric are separate fabrics. The crotch fabric is substantially rectangular and its short side is approximately ¼ or less of the circumference of the thigh in the male undergarment, and The substantially center line with the back side can be configured to be on the back side with respect to the substantially center line between the abdominal side and the back side in the male underwear.

  In addition, a men's underwear according to another aspect of the present invention includes a body fabric portion that covers the buttocks and the side portions, a waist rubber portion, a placket portion that includes a bulging portion that houses a local portion, and a crotch fabric fabric. Is a male underwear sewn, wherein the crotch fabric is substantially rectangular, the short side of which is about 1/4 or less of the circumference of the thigh in the male underwear, and the The approximate center line between the abdominal side and the back side of the crotch fabric is located on the back side of the approximate center line between the abdominal side and the back side of the male underwear.

More preferably, in the underwear for men according to any aspect, the surface opposite to the skin side can be configured to be water-repellent in the placket.
More preferably, in the men's underwear according to any aspect, the placket is composed of a front placket and a back placket, forms a front opening front opening, and in the back placket, It is possible to configure so that the opposite surface is water-repellent.

  More preferably, in the men's underwear according to any of the aspects, the thread for sewing each part constituting the male underwear can be configured to be a waterproof thread.

  According to the present invention, the incontinence pants worn by the sick are different in form and are usually comfortable underwear, and even if there is dripping after urination, the pants are exuded and soiled. No men's underwear can be provided.

It is a front view which shows schematic structure of the underwear for men which concerns on this invention. It is a rear view of the male underwear shown in FIG. It is the figure which looked up at the crotch in the state which wore the men's underwear shown in FIG. It is a front view which shows schematic structure of the male underwear which is a comparative example (the 1). It is the figure which looked up at the crotch in the state which wore the men's underwear shown in FIG. It is a front view which shows schematic structure of the male underwear (the 2) which is a comparative example. It is the figure which looked up at the crotch in the state which wore the men's underwear shown in FIG. It is a figure which shows the evaluation result of the underwear for men which concerns on this invention.

Hereinafter, men's underwear 100 is explained in detail as an embodiment of the present invention based on a drawing.
<Overall configuration of men's underwear>
1 to 3 are diagrams showing a front-opening male underwear 100 according to the present embodiment. FIG. 1 is a front view showing a schematic configuration of the male underwear 100. FIG. FIG. 3 is a rear view of the undergarment 100, and FIG. 3 is a view looking up at the crotch with the male undergarment 100 worn.

  As shown in these drawings, the men's underwear 100 is roughly composed of a front body side part 132 that covers the side part and a back body part 134 that covers the buttocks part, a hem part 140, The waist rubber portion 150, the crotch portion fabric 160, and the placket portion 120 having a bulging portion that accommodates the male local portion are stitched together. The thread that sews each part of the male underwear 100 is preferably a waterproof thread.

  The placket 120 has a double structure of a front placket 122 and a back plaster 124, and forms a front opening front opening. The reverse side placket 124 has a water-repellent surface opposite to the skin side, and when the male stores the local part (penis) in the male underwear 100 after urination, the urine dripped in the male underwear 100. Is rapidly absorbed by the surface on the skin side and prevents urine from seeping out from the opposite surface on the skin side which has been subjected to water repellent treatment. In addition to natural fibers such as cotton, fibers having water absorption properties such as regenerated cellulose fibers such as cupra and viscose rayon, synthetic fibers such as water-absorbed polyester, etc. may be used as the raw yarn for knitting the back-side placket 124. Further, as the knitted fabric, milling knitting or smooth knitting, and further, a weft knitted fabric such as a tentacle knitting, and a warp knitted fabric such as a raschel knitting are suitably used. As the water-repellent treatment applied to the surface opposite to the skin side of the back-side placket 124, those used as a normal water-repellent agent for synthetic fibers, such as a silicone-based water repellent and a fluorine-based water repellent, are used. There is no particular limitation. Among these, a fluorine-based water repellent is preferable from the viewpoint of durability and safety. As the processing means, water-repellent processing can be easily performed by printing means such as roller printing, screen printing, and ink jet printing.

It is preferable that the water-repellent processing by printing is performed to 40% or more with respect to the area of the surface opposite to the skin side of the back side placket 124.
It is more preferable that the placket 120 is deodorized and antibacterial processed, and the odor of the body fluid absorbed by the piece of cloth is deodorized by the deodorizing function, so that a comfortable state can be maintained for a long time.
For example, as disclosed in Japanese Patent No. 3787675, fibers serving as a raw yarn are treated with a treatment liquid containing chitosan and / or modified chitosan, a carboxylic acid polymer, zinc oxide and a binder resin to form these coating layers. By using the prepared fibers, it is possible to obtain a fabric such as an underwear having an excellent deodorizing effect and having good washing resistance (durability). In addition, it is also preferable to perform a water absorption process on the skin side surface. Examples of the water-absorbing process include an alkali weight-reducing process of polyester, a polyester polyalkylene glycol copolymer resin, a so-called water-absorbing polyester resin, and a hydrophilic processing agent such as cellulose and hydrophilic silicon attached to the fiber surface.

Furthermore, in order to prevent the urine from seeping out from the surface opposite to the skin side of the placket 120 in this way, the water absorbing process and / or the water repellent process may be performed in the front placket 122 as well. preferable.
Moreover, the surface opposite to the skin side of the back side placket part 124 can also be comprised with a hydrophobic thread | yarn. The hydrophobic yarn is not particularly limited, but polypropylene yarn, polyester water-repellent yarn, acrylic water-repellent yarn, nylon water-repellent yarn, acetate water-repellent yarn, ethylene vinyl alcohol water-repellent yarn, and the like are preferably used. .

For example, the front placket 122 is first cut so as to form a convex side edge with a knitted fabric such as a weft knitted fabric or a warp knitted fabric, or a woven fabric, and this side edge is formed into a convex shape. It is formed so as to be provided with a bulging portion that is swelled in a convex shape by stitching together with a suture line 170 along a curved line. Thereby, the abdomen and / or the male local part can be covered softly without being excessively tightened.
The back-side placket 124 is constituted by, for example, a knitted fabric such as a single weft knitted fabric or a warp knitted fabric, or a woven fabric, and the length of the back-side placket 124 is made longer than the length of the front-side placket 122. Further, the lower edge portion of the back-side placket 124 is formed in an open shape without being sewn to the crotch portion so that the local portion can be easily taken out for small use.

  The integrated body part 130 is an integrated body part formed by integrally forming the front side side part 132 and the back part 134, and is integrally sewn with the front part 120 by a suture line 170. In the present embodiment, the body side cloth 132 and the back body 134 are integrated into a body cloth, but the present invention is not limited to this, and another shape body cloth member (for example, The front side arm 132 and the back body 134 may be separate bodies.

The hem 140 is formed of a suitable elastic narrow fabric formed in a ring shape at the lower end around the hem of the leg, and is folded in a double-folded manner at the lower end of the integrated body portion 130. In this case, it is appropriately stitched around the hem.
The waist rubber portion 150 is formed of a suitable elastic thin fabric formed in a ring shape at the waistline portion, and is formed on the waist-side upper end portion of the integrated body fabric portion 130, the front-side placket portion 122, and the back-side placket portion 124. It is designed to be sewn appropriately.

  The crotch fabric 160 is a rectangular fabric composed of a knitted fabric such as a weft knitted fabric or a warp knitted fabric, or a woven fabric, and has a front side standing portion 122 and a side on the front side at the edge on the front side. The portion 132 and the suture line 180 are sewn, and the rear body 134 is sewn with the back body 134 and the suture line 190 at the edge on the rear side. In the present invention, the crotch portion fabric 160 separate from the front body (front side side portion 132) and the back body 134 is not an essential component, but the leg portion is formed by forming a chic portion with the crotch portion fabric 160. Smooth movement is possible without hindering the movement of the pants, and even when the legs are widened, the pants are not torn or torn, and the pants are less likely to slide down.

<Composition of crotch fabric>
The male undergarment 100 according to the present embodiment is constituted by a crotch fabric 160 having the following characteristics. The crotch fabric 160 is substantially rectangular, and its short side is approximately ¼ or less of the circumference of the thigh in the male undergarment 100, and the abdomen and back sides of the crotch fabric 160. Is located on the back side of the approximate center line between the ventral side and the back side of the male underwear 100.

  As shown in FIG. 3, when looking up at the crotch while wearing the male underwear 100, the short side of the crotch fabric 160 is about ¼ or less of the circumference of the thigh in the male underwear 100. It is a certain length L (1), and the approximate center line (the crotch fabric center line) between the ventral side and the back side of the crotch fabric 160 is the distance between the ventral side and the back side of the male underwear. It can be seen that it is on the back side of the approximate center line (underwear center line). According to such a configuration, as shown in FIG. 1, in a plan view on the abdomen side in a state where the male undergarment 100 is placed on a plane, it intersects with a straight line drawn downward from the approximate center of the placket 120. The suture line is not visible.

On the other hand, as a comparative example, a conventional male underwear 200 and a male underwear 300 will be described with reference to the drawings.
A conventional male undergarment 200 shown in FIG. 4 and FIG. 5 includes an integrated body cloth portion 230 composed of a front side side portion 232 that covers the side portion and a rear body portion 234 that covers the heel portion, a hem portion 140, and a waist rubber portion. 150, a crotch fabric 260, and a placket 220 having a bulging portion for accommodating a male portion are stitched together. The crotch fabric 260 constituting the male underwear 200 is substantially rectangular, and its short side is approximately 1/3 longer than approximately 1/4 of the circumference of the thigh in the male underwear 100.

  For this reason, as shown in FIG. 5, when looking up at the crotch while wearing the male underwear 200, the short side of the crotch fabric 260 is approximately 1 / of the circumference of the thigh in the male underwear 100. The length L (2) is longer than 4. According to such a configuration, as shown in FIG. 4, in a plan view on the abdomen side in a state where the male undergarment 200 is placed on a flat surface, it intersects with a straight line drawn downward from the approximate center of the front portion 220. The suture line 280 is visible.

Further, another conventional male undergarment 300 shown in FIG. 6 and FIG. 7 includes an integrated body fabric portion 330 composed of a front side side portion 332 that covers the side portion and a rear body portion 334 that covers the buttocks portion, and a hem portion 140. The waist rubber portion 150, the crotch fabric 360, and the placket portion 320 having a bulging portion that accommodates the male local portion are stitched together. The crotch fabric 360 constituting the male underwear 300 is substantially rectangular, and its short side is approximately 1/4 or less of the circumference of the thigh in the male underwear 100. The approximate center line between the ventral side and the back side is on the ventral side relative to the approximate center line between the ventral side and the back side in the male underwear 300.

  For this reason, as shown in FIG. 7, when looking up at the crotch while wearing the male underwear 300, the short side of the crotch fabric 360 is approximately 1 / of the circumference of the thigh in the male underwear 300. The length L (3) is 4 or less, but the approximate center line between the abdominal side and the back side of the crotch fabric 360 (the crotch fabric center line) is the abdominal side and back side of the male underwear. It can be seen that it is on the ventral side of the approximate center line (underwear center line). According to such a configuration, as shown in FIG. 6, the male underwear 300 intersects with a straight line drawn downward from the approximate center of the placket 320 in a plan view on the ventral side in a state where the male underwear 300 is placed on a plane. The suture line 380 is visible.

  As described above, the male undergarment 100 according to the present embodiment constitutes the crotch fabric 160 with a characteristic shape (short side is length L (1)), and has a characteristic positional relationship (the crotch part). When the fabric center line is sewn to each part of the male undergarment 100 on the back side of the undergarment center line, the suture line 180 becomes the suture line 280 of the conventional male undergarment 200 shown in FIGS. In addition, about 30 mm wraps around the back body side (back side) without coming out to the front body side (abdominal side) from the suture line 380 of the conventional male underwear 300 shown in FIGS. 6 and 7. This is a plan view of the abdomen in a state where the male underwear 100, the male underwear 200, and the male underwear 300 are placed on a flat surface. In the male underwear 100, as shown in FIG. The suture line 180 that intersects with the straight line drawn downward from the lower side is not visible, whereas in the male underwear 200, as shown in FIG. 6 is greatly different in that the suture line 280 can be visually recognized, and in the male undergarment 300 as shown in FIG. 6, the suture line 380 that intersects with a straight line drawn downward from the approximate center of the placket 320 can be visually recognized. .

  As described above, in the male undergarment 100 according to the present embodiment, when the male stores the local part in the male undergarment 100 after urination, the urine remaining in the urethra is dripped in the male undergarment 100. Even if it propagates downward (crotch side) according to gravity, the suture line 180 wraps around to the back body side (back side), so that it does not reach the suture line 180. For this reason, urine does not propagate from the perforation hole and / or the seam of the sewing line 180 and ooze out to the front side of the male underwear 100 (that is, the outer trouser side).

  On the other hand, in the male undergarments 200 and 300 according to the comparative example, when urine remaining in the urethra is dropped on the male undergarments 200 and 300, it propagates downward (in the crotch side) according to gravity, and the suture lines 280 and 380 are rearward. Since it does not go around to the body side (back side), there is a possibility that the urine dripped up to the suture lines 280 and 380 may reach. For this reason, urine may propagate from the perforation holes and / or seams of the sewing lines 280 and 380 and ooze out to the front side of the male undergarments 200 and 300 (that is, the outer pants side). .

<Evaluation by dropping experiment>
As described above, the male underwear 100 according to the present embodiment was used as an example, and the male underwear 300 (or the male underwear 200 may be used) was used as a comparative example, and evaluation was performed by a drop experiment. The evaluation results will be described below.
The method of the dropping experiment is that the male undergarment 100 according to the example and the male undergarment 300 according to the comparative example are respectively worn on the torso with holes, and predetermined moisture is provided from the open end of the tube attached in the vicinity of the position of the external urethral orifice. An amount (1 ml or 2 ml) was added dropwise. After dropping, the outer garment was allowed to wear on the male underwear worn on the torso, and the oozing of moisture into the male undergarment and the outer garment was visually confirmed. This means that after urination, the local area was stored in the men's underwear (pants) and the outer garments (trousers) were worn so that they touched the pants (pants and other outerwear were pulled up or the fasteners were closed). To do.

In addition, as for the male underwear 100 which is an Example, as above-mentioned, in the back side front part 124, the surface opposite to the skin side is water-repellent processed, and each part which comprises the male underwear 100 is stitched | sutured. The thread is a waterproof thread. The underwear 300 for men, which is a comparative example, has the same fabric as the body of the front part, is neither water-absorbing nor water-repellent, and the men's underwear 300
A normal thread that is not a waterproof thread is used as the thread that stitches each of the components. Moreover, as an outer garment, a gray normal boxer short was adopted as a substitute for an outer for easy visual confirmation.

  As shown in the embodiment of FIG. 8, the men's underwear 100 oozes out in the area surrounded by white circles in the male underwear 100 regardless of whether the dripping amount is 1 ml or 2 ml. However, the dripped water permeates into the back of the male undergarment 100, but does not ooze out into the outer garment. This is because the suture 180 wraps around the back body side (back side) even if moisture dropped from the open end of the tube propagates downward (crotch side) according to gravity in the male underwear 100. Therefore, since it does not reach the suture line 180, it does not ooze into the outer garment.

  On the other hand, as shown in the comparative example of FIG. 8, even when the dripping amount is 1 ml, in the male underwear 300, moisture has dropped from the male underwear 300. This is because in the male underwear 300, the water dripped from the open end of the tube propagates downward (crotch side) according to gravity, and the suture line 380 does not wrap around the back body side (back side). The water that reached the suture line 380 dropped from the perforated hole and / or the seam of the sewing line 380. Since it is in such a state, of course, in the comparative example, moisture exudes to the outer garment.

  As described above, in the male undergarment 100 according to the example, even if the dripping amount is changed from 1 ml to 2 ml, it is only possible to confirm that the moisture diffusion amount inside the male underwear 100 is increased, and to the outer garment. There is no bleeding. On the other hand, in the male undergarment 300 according to the comparative example, when 1 ml of water is dropped (without confirming by wearing an outer garment), the water is falling from the suture line 380 of the male underwear 300.

  As described above, according to the male undergarment 100 according to the present embodiment, the crotch fabric 160 is substantially rectangular and its short side is approximately 1/4 of the circumference of the thigh in the male undergarment 100. It is the following, and it is constituted so that the approximate center line of the abdomen side and back side in cloth 160 for crotch may be on the back side rather than the approximate center line of the abdomen side and back side in this underwear 100 for men. did. For this reason, even if a man stores a local part in the male underwear 100 after urination, urine remaining in the urethra drops in the male underwear 100 and propagates downward (crotch side) according to gravity. Since the suture line 180 wraps around the back body side (back side), the suture line 180 does not reach the suture line 180 where the perforated hole and / or seam of the sewing machine exists, and the front side of the male undergarment 100 ( That is, the urine dripped onto the outer pants side) does not ooze out.

<Other embodiments>
(1) In the men's underwear 100 according to the above-described embodiment, the front part 120 is configured by a double structure of the front side front part 122 and the back side front part 124 and forms a front opening front opening part. . However, the present invention may be a front closing type that does not include such a front side opening. Even in this case, the placket has a bulging portion, and the surface opposite to the skin side is water-repellent, so that when the male stores the local area in the male underwear after urination, The urine dripped in is quickly absorbed by the skin side surface, and prevents the urine from seeping out from the opposite surface of the skin side subjected to the water repellent finish.

  (2) In the male undergarment 100 according to the above-described embodiment, the crotch fabric 160 is a separate fabric from the front body (front side side portion 132) and the back body 134. However, according to the present invention, the crotch fabric may be formed of a fabric that is integral with the front body (front side side portion 132). In this case, there is no stitch line (stitch line 180 shown in FIG. 2) between the crotch fabric and the front body. Therefore, as with the male undergarment 100, when the male stores the local area after urination in the male undergarment where the suture line 180 does not exist, urine remaining in the urethra is contained in the male undergarment. Even if dripped, it does not ooze out to the front side of men's underwear (that is, the pants side which is an outer).

It should be noted that even a male undergarment that does not have such a suture line 180 is configured such that when the male undergarment is worn, smooth movement is possible without hindering the movement of the legs.
(3) Further, in the case of (2) above, the crotch fabric is the front body (the front side side 132).
Also, it may be made of a cloth that is integral with the back body 134. In this case, as in (2) above, there is no stitching line (stitching line 180 shown in FIG. 2) between the crotch fabric and the front body, and in addition, the crotch fabric and the back body. No suture line (suture line 190 shown in FIG. 2) exists. Therefore, as with the male undergarment 100, when the male stores the local area after urination in the male undergarment where the suture line 180 does not exist, urine remaining in the urethra is contained in the male undergarment. Even if dripped, it does not ooze out to the front side of men's underwear (that is, the pants side which is an outer).

  The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is defined by the terms of the claims, rather than the description above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

  The present invention is suitable for men's underwear, and is particularly suitable for men's underwear with good wearing feeling that does not bleed out and become dirty even when there is dripping after urination.

100 Male underwear (Example)
DESCRIPTION OF SYMBOLS 120 Front part 122 Front side front part 124 Back side front part 130 Integrated body cloth part 132 Front side side part 134 Rear body part 140 Bottom part 150 Waist rubber part 160 Crotch part cloth 170, 180, 190 Suture line 200, 300 Male underwear ( Comparative example)

Claims (4)

A men's underwear in which a body cloth part covering the buttock and the side part, a waist rubber part, a placket part including a storage part for storing a local part, and a crotch cloth are sewn,
The placket and the crotch fabric are separate fabrics,
The placket is composed of a fiber having water absorption, and the surface opposite to the skin side is water repellent,
From the position where the vertical center line and the horizontal center line of the male undergarment intersect in a plan view on the ventral side in a state where the waist rubber part of the male undergarment is placed on a flat surface with the hem part facing down Men's underwear, characterized in that a suture line intersecting with the downward vertical center line cannot be seen. The crotch fabric has a rectangular shape , the short side of which is equal to or less than 1/4 of the circumference of the thigh in the male undergarment, and the crotch fabric has a ventral side and a back side . neutral alignment, characterized in that the back side of the center line in the ventral and back side of the underwear for men, male undergarment of claim 1. The placket section, consists and a front placket portion and the back side placket portion, to form a front opening of the front opening,
The underwear for men according to claim 1 or 2, wherein a surface opposite to the skin side is water-repellent processed in the back side placket. The male undergarment according to any one of claims 1 to 3 , wherein a thread for sewing the respective parts constituting the male undergarment is a waterproof thread.