Provided is a sitting aid suitable for keeping the pelvis inclined at a sitting position while keeping it comfortable for a long period of time, easy to be seated, and suitable for holding a posture of a physically handicapped. What is claimed is: 1. A seat aiding tool for use with an exterior body comprising a back surface portion and a seating surface portion, a cushion provided on a seat surface portion of the exterior body, and a seat surface portion of the exterior body being placed on a chair or a wheelchair having a back portion, A cushion which gradually thickens its wall thickness towards the center of the seat surface portion and an inclined surface whose surface on the seat surface is gradually increased from the back to the center of the seat surface portion and is hung from above the back portion To support the back of the seated person and the seating surface, one end of the stretchable elastic cord is fixed to the rear end of the seat surface and the other end can be latched in front of the seat surface of the chair And is characterized in that it is a seat aid.着座時に骨盤が傾斜した位置にありながら長期に安楽に維持させるのに適した、着座動作がしやすく、身障者の姿勢保持にも適した着座補助具を提供する。 背面部と座面部からなる外装体とその座面部にクッションを備えた、榻背部を有する椅子又は車椅子に該外装体の座面部を載置して使用する着座補助具であって、座面部後方から座面部中央方向に向かって徐々にその肉厚を厚くするクッションと、座面上平面を座面部後方から中央に向かって徐々に高した傾斜面を備え、榻背部上方から吊り下げらることで着座者の背面と座面を支持するものであって、さらに伸縮性の弾性紐体の一端を座面部裏面側後端部に固定して、他端を椅子の座面前方に係止可能としたことを特徴とする着座補助具である。
