[Issue] simple structure by easy to carry and can auxiliary of leg strength. A The legs assist device 100 includes a foot fixed portion 1 is fixed to the users foot by wrapping the users feet from the top of the shoe, the elastic cord 2 which is one end to the foot fixing section 1 is connected, consists of sash hanging can be the size of the annular sash 3 Metropolitan in the body of and the other end of the elastic cord 2 is connected user. When the user raises the legs, because the legs are pulled up by the elastic member, the elastic force acts as soon as the bent legs, it is possible to raise the leg with a small force. User when the lower leg, it is possible to extend the legs easily with a small force it means to pull the elastic cord 2 by the operation to extend the legs. Is summarized in a state of being connected with the foot fixing section 1, the rubber cord 2 and appropriately divided and rubber cord or 2 the annular band 3 at the time of carrying, it can be made compact. Therefore, it is convenient to carry. [Selection Figure] Figure 1【課題】 簡単な構造で脚力の補助ができ且つ持ち運びしやすいこと。【解決手段】 この脚力補助装置100は、ユーザの足に靴の上から巻き付けることでユーザの足に固定する足固定部1と、足固定部1にその一端が連結されたゴム紐2と、ゴム紐2の他端が連結され且つユーザの体にタスキ掛けできる寸法の環状タスキ3とから構成される。ユーザが脚を上げるとき、弾性部材により脚が上に引っ張られるので、脚を曲げた途端に弾性力が作用し、少ない力で脚を上げることができる。ユーザが脚を下げるときは、脚を伸ばす動作によりゴム紐2を引っ張ることになるので小さい力で簡単に脚を伸ばすことができる。持ち運び時には前記足固定部1、ゴム紐2及び環状バンド3を適宜分割して或いはゴム紐2で連結した状態で纏め、コンパクトにできる。このため、持ち運びに便利である。【選択図】 図1