Man's underpants

The utility model refer to a pair of man's underpants which comprises a crotch part (1), a pant body (2), joint parts (3) and a pant waist (4), wherein an upper end of the pant body (2) is connected with the pant waist (4), the crotch part (1) is connected with the pant body (2) through the joint parts (3), the crotch part (1) is made from a piece of material raised like a smooth hill to an extent to match with the body shape of a man's corresponding part, and the crotch part (1) is connected with the joint parts (3) of the pant body (2) in a stitching manner. Because the crotch part is made from one piece of material without piecing or a double-layer material design, a user feels cool and ventilating when wearing the underpants, and because the crotch part does not have material piecing, uncomfortableness brought about by contact friction can be reduced. The crotch part is neat and protrudes in a three-dimensional manner. The man's underpants are reasonable in design, convenient and practical.