The bottom clothes have: a main body part 10 that covers at least each buttocks part; and a band-like first tightening part 20, 20 and a band-like second tightening part 30, 30 both of which are disposed in pairs on left and right sides of the main body part 10 and have tightening forces stronger than that of the main body part 10, wherein the first tightening part 20, 20 is disposed on a rear center side from a top D of the buttocks part and extends vertically from a main body upper part E to a gluteal fold F, and the second tightening part 30, 30 is disposed below the top D of the buttocks part, covers at least an upper section of the gluteal fold F and extends upward from a lower end part of the first tightening part 20, 20 upward to a side.