PROBLEM TO BE SOLVED: To provide a muscular strength assisting device capable of accommodating the physique difference of users and being fit to a body even with a different physique.SOLUTION: The muscular strength assisting device for supporting the movement of a joint of a users elbow, knee, wrist, or the like includes one wearing implement 110 arranged along one bone of the joint the other wearing implement 120 arranged along the other bone of the joint and elastic joints 130 connecting one wearing implement 110 to the other wearing implement 120. One of the wearing implements 110, 120 is composed of a plurality of divided plates 111, 112, 113, and the respective divided plates 111, 112, 113 are connected by elastic connecting bodies 114.COPYRIGHT: (C)2010,JPO&INPIT【課題】使用者の体格差を許容でき、体格が異なっても身体にフィットする筋力補助装置を提供する。【解決手段】筋力補助装置は、関節の一方の骨に沿って配置される一方の装着具110と、関節の他方の骨に沿って配置される他方の装着具120と、一方の装着具110と他方の装着具120とを連結する弾性体関節130とを備え、使用者の肘、膝、又は手首などの関節の動作を支援し、いずれかの装着具110、120を、複数の分割プレート111、112、113によって構成し、それぞれの分割プレート111、112、113を弾性連結体114で連結した。【選択図】図1