PURPOSE: To protect a stopper from being deformed due to contact with others during a transport, and avoid damaging a body with the stopper at the time of building the stopper into the structure of a vehicle.

CONSTITUTION: This cushion is formed out of a seat cushion pad 12 integrally foamed out of resin, with a wire frame 11 internally buried, a stopper pocket 14 recessed on the rear lower side 13 of the pad 12 for partially exposing the frame 11, and a stopper 15 rotatably jointed to the exposed section of the frame 11. Also, the stopper pocket 14 rotates the stopper 15 around the frame 11, thereby the stopper 15 is detachably fixed.