To provide a garment with a crotch part such as a girdle fitting to a human body (at least a bottom part).

The garment with a crotch part has the following structure: two tightening line parts 21, 22 having longitudinally tightening force run on from a body front face side (F) to a body back face side (R) each into one piece, and extend upward from a crotch part so as to separate from side to side so that a wearer is easy to throw strength into her abdominal part at the body front face side and her articulatio sacroiliaca is supported to make her waist stable at the body back face side and thereby the wearer is easy to move her right and left hips independently when walking; and tightening line parts 21R, 22R pass near the side of the sacral bone at the body back side so that the gluteal cleft gets unsupported and thereby stretch in the gluteal cleft skin is not hindered from stretching so as to enable the wearer to easily put her legs forward when walking.