PROBLEM TO BE SOLVED: To provide an exercise auxiliary device having high convenience.SOLUTION: An exercise auxiliary device 1 comprises: a seat part 10 which can be oscillated a backrest 51 and a pair of arm rests 52. The pair of arm rests 52 respectively have a holding air bag 62 for holding a pelvis of a user in a state in which a user is seated on the seat part 10, and the seat part 10 is oscillated in a state of inflating the holding air bags 62. In other embodiment, the exercise auxiliary device 1 comprises a seat part 10 which can be oscillated, a backrest 51 and a pair of arm rests 52, and the pair of arm rests 52 respectively have a holding air bag 62 for holding a waist part of a user in a state in which the user is seated on the seat part 10, and the seat part 10 is oscillated in a state of inflating the holding air bag 62.SELECTED DRAWING: Figure 1COPYRIGHT: (C)2018,JPO&INPIT【課題】利便性が高い運動補助装置を提供する。【解決手段】運動補助装置1は、揺動可能な座部10と、背もたれ51と、一対の肘掛け52とを有し、一対の肘掛け52は、使用者が座部10に坐った状態で使用者の骨盤を保持する保持エアバッグ62を有し、保持エアバッグ62を膨張させた状態で座部10が揺動する。または、揺動可能な座部10と、背もたれ51と、一対の肘掛け52とを有し、一対の肘掛け52は、使用者が座部10に坐った状態で使用者の腰部を保持する保持エアバッグ62を有し、保持エアバッグ62を膨張させた状態で座部10が揺動するものである。【選択図】図1