PROBLEM TO BE SOLVED: To provide a mens undergarment having a combined function of absorbing residual urine leak after urinating, and promoting dryness while holding the scrotum and penis.SOLUTION: A mens undergarment includes a cloth underpants body 5 having a waist opening 2, a leg opening 3 and a crotch part 4, a window part 6 set on a front part 5a of the underpants body 5 and exposing the scrotum and penis of a wearer, a cloth front cloth part 8 covering the front part 5a of the underpants body 5 including the window part 6, arranged between a waist opening rim 2a of the waist opening 2 and the crotch part 4, and formed with a bag-like bottom part 8b covering the scrotum and penis exposing from the window part 6, and ventilation openings 9 arranged on the right and left sides of the upper position near the bag-like bottom part 8b of the front cloth part 8, and formed by the front part 5a of the underpants body 5 and the front cloth part 8 so as to be able to let open air go in and out from the bag-like bottom part 8b.COPYRIGHT: (C)2014,JPO&INPIT【課題】 排尿後の残尿洩れを吸収するとともに、陰のう及び陰茎を保持しつつ乾燥を促進させる複合機能を有するようにした男性用下着を提供する。【解決手段】 ウエスト開口部2、レッグ開口部3及び股下部4を有する布製のパンツ本体5と、パンツ本体5の前部5aに設けられ、着用者の陰のう及び陰茎を露出させる窓部6と、窓部6を含むパンツ本体5の前部5aを覆い、ウエスト開口部2のウエスト開口縁2a側と股下部4側との間にわたって配され、窓部6から露出される陰のう及び陰茎を覆い隠す袋状底部8bが形成される布製の前布部8と、前布部8の袋状底部8bに近接する上方位置の左右側に配され、パンツ本体5の前部5aと前布部8とによって、袋状底部8b内に外気を出入り可能として形成される通気開口部9と、を備えることを特徴とする男性用下着。【選択図】 図1