Problem to be solved: to provide a muscular assist device capable of reducing the load of the whole arm.The force assisting apparatus 100 is a first attachment 10 attached to the fuselage 7 of the wearer 6, a second attachment 20 attached to the upper arm 8 of the wearer 6, and a rotation connected to the second fitting 20 so as to be rotatable controllable about the rotation axis with respect to the first fitting 10 A member 41 is provided.The second mounting member 20 has a arm mounting member 37 mounted on the upper arm 8, and a connecting arm portion extending from the rotary member 41 to connect the rotary member 41 and the arm mounting member 37.The arm mounting member 37 is rotatably connected to the connecting arm portion.Diagram【課題】腕全体の負荷を軽減可能な筋力補助装置を提供することにある。【解決手段】筋力補助装置１００は、着用者６の胴体７に取り付けられる第１装着具１０と、着用者６の上肢８に取り付けられる第２装着具２０と、第１装着具１０に対して回転軸線を中心として回転制御可能に支持され且つ第２装着具２０に接続された回転部材４１と、を備える。第２装着具２０は、上肢８に装着される腕装着部材３７と、回転部材４１から延び出して回転部材４１と腕装着部材３７とを連結する連結アーム部と、を有する。腕装着部材３７は、連結アーム部に対して回転可能に接続される。【選択図】図１
