Problem to be solved: to provide an operation assisting device capable of suppressing the deviation of the mounting member for attaching the arm member to the thigh.An operation assisting device is an active joint portion disposed at a position corresponding to the hip joint of the side of the user, an arm member rotatably supported about an active joint portion, an actuator for generating the rotational torque of the arm member, and an arm member to be attached to the thigh of the user In the operation assisting device having the mounting member of the mounting member and the mounting member, the mounting member is provided in the middle of the winding direction of the base member to which the arm member is connected and wound around the thigh, and the winding direction to the thigh in the base material, and the winding of the base materialIncludes a fastener including at least one fastener to couple a first portion of one side of the side and a second portion of the other side.Diagram【課題】アーム部材を大腿部に取り付けるための装着部材のずれを抑制可能な動作補助装置を提供する。【解決手段】動作補助装置は、ユーザの側方の股関節に対応する位置に配置される能動関節部と、能動関節部を中心に回動自在に支持されたアーム部材と、アーム部材の回転トルクを生成するアクチュエータと、アーム部材をユーザの大腿部に取り付けるための装着部材と、を備えた動作補助装置において、装着部材は、アーム部材が連結され大腿部に巻き付けられる基材と、基材における大腿部への巻付け方向の途中に設けられ、基材の巻付け方向の一の側の第1の部分と他の側の第2の部分とを連結する少なくとも1つのファスナーを含む締結部と、を備える。【選択図】図5
