PROBLEM TO BE SOLVED: To reduce consumption energy in using a rotary device and also restrain abrasion or damage of the rotary device and a driving device for driving it.SOLUTION: This wearable movement assisting device 1 includes: a movement assisting wearing means 10 having a plurality of members (a trunk member 11, an upper arm member 13 and a front arm member 15) connected through a plurality of rotary shafts (12a, 12c, 14a) and adapted to achieve a relative rotary motion of the other members to the one member around the rotary shaft and a rotation restraining means (a lock mechanism 30 and a rotation restraining part 62) for restraining at least one of two or more rotary motions caused by the movement assisting wearing means 10.COPYRIGHT: (C)2012,JPO&INPIT【課題】回動装置を使用する際の消費エネルギを節減するとともに、回動装置やこれを駆動する駆動装置の磨耗や損傷を抑制する。【解決手段】装着式動作補助装置1は、複数の回動軸(12a、12c、14a)を介して連結された複数の部材(体幹部材11、上腕部材13、前腕部材15)を有し、回動軸を中心とした一の部材に対する他の部材の相対的な回動運動を実現させる動作補助装着具10を備えるとともに、動作補助装着具10による複数の回動運動のうち少なくとも何れか一つを抑制する回動抑制手段(ロック機構30、回動抑制部62)を備える。【選択図】図1