PROBLEM TO BE SOLVED: To provide a bending / stretching support tool capable of supporting a joint in a direction of stretching with a larger force as the degree of flexion of the joint increases. SOLUTION: This is a flexion / extension support tool that is used by being attached to a body and supports a flexion / extension motion of a joint, and is attached to a support portion that covers the joint that supports the flexion / extension motion and is attached to the body, and the support portion. It consists of a body-mounted part that is fixed to a person, and the support part becomes unloaded when the joint is extended, and when the joint is bent, the bending elastic stress in the thickness direction causes the joint to bend and stretch. As a bending / stretching support tool that urges the body-mounted portion in the direction of extending the joint. [Selection diagram] Fig. 3【課題】関節の屈曲度合いが大きくなるにつれて、より大きな力で関節を伸ばす方向に支援する事のできる屈伸サポート具を提供すること。【解決手段】身体に装着して使用され、関節の屈伸動作を支援する屈伸サポート具であって、前記屈伸動作を支援する関節を覆って身体に装着されるサポート部と、当該サポート部を装着者に固定する身体装着部とからなり、前記サポート部は、関節を伸ばした状態において無負荷となり、当該関節を曲げることにより、その厚さ方向への曲げ弾性の応力により、前記関節の屈伸動作を支援して当該関節を伸ばす方向に前記身体装着部を付勢する屈伸サポート具とする。【選択図】図３
