joint assist device of the present invention, the inner support plate to be placed on the inside of the joint 1b and the outer support plate 1a which is disposed on the outside of the joint, the connecting member 30 which connects with the rear knee side and the inner supporting plate 1b and the outer support plate 1a, rotatable on the upper end of the inner support plate 1b into a first inner arm 10b provided, and the second inner arm 20b provided rotatably on the lower end of the inner support plate 1b, the first of which the upper end side of the outer support plates 1a disposed rotatably comprising an outer arm 10a, and a second outer arm 20a which at the lower end of the outer support plate 1a is provided rotatably, a first inner arm 10b, a first outer arm 10a, a second inner arm 20b, and a second outer arm 20a, is characterized in that it is composed of a thermoplastic resin, it is possible to improve the visibility of the appliance enables adjustment fitting attached to the body shape of the user.本発明の関節アシスト装置は、関節の内側に配置される内側支持板1bと、関節の外側に配置される外側支持板1aと、内側支持板1bと外側支持板1aとを後膝部側で連結する連結部材30と、内側支持板1bの上端側に回動自在に設けられる第1の内側アーム10bと、内側支持板1bの下端側に回動自在に設けられる第2の内側アーム20bと、外側支持板1aの上端側に回動自在に設けられる第1の外側アーム10aと、外側支持板1aの下端側に回動自在に設けられる第2の外側アーム20aとを備え、第1の内側アーム10b、第1の外側アーム10a、第2の内側アーム20b、及び第2の外側アーム20aを、熱可塑性樹脂で構成したことを特徴とし、使用者の体形にフィットした調整が可能となり装具装着の被視認性を改善することができる。
