PROBLEM TO BE SOLVED: To provide a standup assisting tool capable of assisting a standing action of a caretaker quickly in accordance with the timing at which a cared person tries to stand up.SOLUTION: A standup assisting tool, which assists a standing action of a cared person when the cared person stands up from a seated state, comprises: an inner bag 20, in which a seat side inner bag 22 and a foot side inner bag 24 which are made of sheet bodies 21 are connected by a connection part 26 and to which an air valve 28 is attached and an outer bag 30 including a seat side inner bag accommodation part 32 for accommodating the seat side inner bag 22, and a foot side inner bag housing part 34 for accommodating the foot side inner bag 24. The standup assisting tool is characterized in that the individual inside space volumes of the seat side inner bag accommodation part 32 and the foot side inner bag housing part 34 are made equal to or smaller than the individual inside space volumes of the seat side inner bag 22 and the foot side inner bag 24.COPYRIGHT: (C)2015,JPO&INPIT【課題】被介護者が立ち上がろうとするタイミングに合わせて、直ちに介護者の立ち上がり動作の補助をすることが可能な立ち上がり用補助具を提供すること。【解決手段】被介護者が着座状態から立ち上がる際に、被介護者の立ち上がり動作を補助するために用いられる立ち上がり用補助具であって、シート体21によりなる座部側内袋体22と足踏側内袋体24が、連結部26により連結されエアバルブ28が取り付けられた内袋体20と、座部側内袋体22を収容する座部側内袋体収容部32と、足踏側内袋体24を収容する足踏側内袋体収容部34とを有する外袋体30と、を具備し、座部側内袋体収容部32と足踏側内袋体収容部34の各内部空間容積は、座部側内袋体22と足踏側内袋体24の各内部空間容積以下に形成されていることを特徴とする。【選択図】図9