The invention discloses a seat cushion. The seat cushion is defined by a crotch area and a hip area which is positioned at the rear of the crotch area. The seat cushion comprises a cushion body, a pedestal arranged under the cushion body, at least one buffer body, a first fixing device and a second fixing device. The at least one buffer body is arranged between the pedestal and the seat cushion; and the hip area has an outline which is substantially same as that of the cushion body and is applied to the separation of the pedestal and the cushion body. The first fixing device is used for fixing the at least one buffer body and the pedestal. The second fixing device is used for fixing the at least one buffer body and the cushion body. The cushion body and the pedestal are buffered by the atleast one buffer body.