Provided are sanitary panties that can be worn comfortably without causing a wearer to feel tightness around the abdomen, and that does not cause side leakage of menstrual blood even during nighttime while the wearer is asleep. The present sanitary panties comprise: a stretchable body cloth (30) that forms the outer surface thereof； a rear-body waterproof cloth that is arranged on a skin-facing surface side of the body cloth (30) and that is located over the entirety of at least a crotch part (13)； and a cylindrical part (20) that extends annularly in a leg-surrounding direction. The cylindrical part (20) includes: an inner part (21) located on an inner side in a lateral direction (X)； and an outer part (22) located on an outer side in the lateral direction (X). The inner part (21) is formed by a portion of the crotch part (13). The inner part (21) has a lower stretchability than the outer part (22). The front body (11) has a higher stretchability in a longitudinal direction (Y) and the lateral direction (X) than the crotch part (13) and a rear body (12).[課題] 在提供一種，穿用者不會感覺到腹部的束緊可舒適地穿用，即使在夜間的就寢時也不會發生經血的側漏的生理用內褲。 [解決手段] 生理用內褲，係具有：形成其外面的伸縮性的身體布料(30)、配置在身體布料(30)的肌膚對置面側，至少位在胯部(13)整體的後身布防水布、以及朝腿圍方向環狀延伸的圓筒狀部(20)。圓筒狀部(20)具有：位在橫向(X)的內側的內側部分(21)、以及位在橫向(X)的外側的外側部分(22)，內側部分(21)由胯部(13)的一部分所形成，內側部分(21)比起外側部分(22)更伸縮性低，前身布(11)比起胯部(13)及後身布(12)在縱向(Y)及橫向(X)具有高的伸縮性。
