SEAT CUSHION

To provide an economical seat cushion capable of avoiding exchange of the whole body even when an outside part in a seat width direction arranged opposite the door opening of a vehicle is degraded.SOLUTION: A seat cushion 3 provided for a seat part 1A of a vehicle seat 1 includes: a cushion body 10 which is positioned in a seat width direction side part and has a first housing part 11 arranged opposite a door opening 2 of a vehicle; and a first end member 20 housed in the first housing part 11. The first housing part 11 has at least a seat upper side and outside in the seat width direction open, the first end member 20 has a shape along an inner surface of the first housing part 11, and is removably fitted to the first housing part 11.SELECTED DRAWING: Figure 1 【課題】車両のドア開口部に対向して配置されるシート幅方向の外側部分の劣化が進んでも全体の交換を回避できる経済的なシートクッションを提供する。【解決手段】車両用シート１の座部１Ａに設けられるシートクッション３は、シート幅方向側部に位置し、かつ、車両のドア開口部２に対向して配置される第１収容部１１を有するクッション本体１０と、第１収容部１１に収容される第１端部材２０と、を備え、第１収容部１１は、少なくともシート上方側およびシート幅方向外側が開口しており、第１端部材２０は、第１収容部１１の内面に沿った形状を有し、第１収容部１１に着脱可能に取り付けられる。【選択図】図１