PROBLEM TO BE SOLVED: To provide a taking bath assistant device capable of preventing floating even when a seating face part of a seating face transfer position is protruded to a washing place, and allowing a person who is helped to be seated on a seating face part.SOLUTION: A taking bath assistant device comprises: movable movement means for moving a seating face part between a seating face transfer position where at least a part of the seating face part is on a long side rim of a bathtub in top view, and the seating face part is closest to the long side rim side, and a seating face lifting upper limit position; a body part having a first load support part which is mounted on the long side rim; and a handhold part. The seating face part forms a protrusion part which can be protruded to outside of the bathtub relative to the first load support part. The handhold part receives a load of a user and provided in the vicinity of the protrusion part so as to support a seating operation of a user. The handhold part prevents floating of the body part by the load which is received thereon.SELECTED DRAWING: Figure 1COPYRIGHT: (C)2018,JPO&INPIT【課題】座面移乗位置の座面部を洗い場側に突出させた場合でも、浮き上がりを防止することができ、被介助者が安全に座面部に座ることができる入浴介助装置を提供する。【解決手段】入浴介助装置は、上面視において座面部の少なくとも一部が浴槽の長辺リム上に位置し、且つ、座面部が長辺リム側に最も寄っている座面移乗位置と、座面昇降上限位置との間で、移動させる可動移動手段と、長辺リム上に載置される第1荷重支持部を有する本体と、手がかり部と、を備える。座面部は、第1荷重支持部よりも浴槽の外側に突出可能な突出部を形成する。手かがり部は、使用者の着座動作をサポートするように突出部の近傍に設けられ使用者の荷重を受ける。手がかり部は、受けた荷重によって本体の浮き上がりを防止する。【選択図】図1