PROBLEM TO BE SOLVED: To provide a flexible battery pack capable of reducing discomfort caused by mounting a battery pack on the body, and a motion assist device.SOLUTION: A flexible battery pack includes a plurality of battery cells 205 arranged in a predetermined direction and a flexible connecting portion 217 connecting the plurality of battery cells, both ends of the flexible connecting portion being connected to a high rigid cover member 213. In addition, a human body-mounted motion assist device includes a flexible battery pack, a mounting fixture having a joint connecting a first member and a second member in a relatively rotatable manner, and an actuator relatively rotating the first member and the second member.SELECTED DRAWING: Figure 6【課題】バッテリパックを身体に装着することによる違和感を軽減可能な可撓性バッテリパック及び動作補助装置を提供する。【解決手段】所定方向に配列した複数のバッテリセル２０５と、複数のバッテリセルを連結する可撓性連結部２１７とを備え、可撓性連結部の両端が高剛性のカバー部材２１３に連結される可撓性バッテリパック。さらに人体装着型動作補助装置は、可撓性バッテリパックと、第１の部材及び第２の部材を相対回転可能に連結する関節部を有する装着具と、第１の部材及び第２の部材を相対回転させるアクチュエータとを備える。【選択図】図６
