PROBLEM TO BE SOLVED: To assist movement of a user by effectively transmitting force generated by an actuator to a user without degrading user's feeling of wear, in a non-grounded type operation assisting device, which assists movement of a human being by use of an actuator.SOLUTION: An operation assisting device 10 comprises: a back wear part 1 which is worn on the back of a user P so as to be supported by the shoulders of the user P with the aid of shoulder belts 4； thigh pressing parts 2 that press the front sides of the thigh parts of the user P； first connection parts 6 that connect the thigh pressing parts 2 such that the thigh pressing parts 2 are rotatable around the back wear part 1； a first actuator 7 that drives the first connection part 6 so as to rotate each thigh pressing part 2 with respect to the back wear part 1, thereby applying force such that the thigh pressing part 2 presses the front side of the corresponding thigh part of the user P； and a structure that is provided on the back wear part 1, and engaged with the body of the user P upwards along the back of the user P, thereby restricting upward movement of the back wear part 1 along the back.COPYRIGHT: (C)2016,JPO&INPIT【課題】アクチュエータを用いて人体の動作を支援する非接地型の動作支援装置において、利用者の装着感を損なうことなく、アクチュエータにより発生させた力を利用者に対して効果的に伝えて利用者の動作を支援する。【解決手段】動作支援装置１０が、肩ベルト４により利用者Ｐの肩で支持された状態で背中に装着される背中装着部１と、利用者Ｐの大腿部の前方側を抑える大腿抑え部２と、背中装着部１に対して回動可能に大腿抑え部２を連結する第１連結部６と、背中装着部１に対して大腿抑え部２を回動させるように第１連結部６を駆動して、利用者Ｐの大腿部の前方側を大腿抑え部２が抑えるように力を作用させる第１アクチュエータ７と、背中装着部１に設けられ、利用者Ｐの胴体に対して背中沿い上向きに係合して、背中装着部１の背中沿い上向きへの移動を規制する構造体と、を備える。【選択図】図３
