An assistant device for degenerative joint includes a main body, a first leg-lifting mechanism, and a second leg-lifting mechanism. The main body has an upper section, a middle section, and a lower section. The middle section is connected between the upper section and the lower section. The upper section has a supporter on a top end thereof. The lower section has a bearing element on a bottom end thereof. It is bendable between the upper section and the middle section, and between the middle section and the lower section. The first leg-lifting mechanism is connected between the upper section and the middle section of the main body. The second leg-lifting mechanism is connected between the middle section and the lower section of the main body. Buffer mechanisms are provides on the upper section, the middle section, the lower section, the first leg-lifting mechanism, and the second leg-lifting mechanism, respectively, for providing elastic buffering function. The present disclosure therefore can effectively share the human body weight to reduce the burden of joints, and is convenient for walking.一種關節退化輔助器，包括一輔助器主體、一第一抬腿機構及一第二抬腿機構。輔助器主體包含一上段部、一中段部及一下段部，中段部連接於上段部及下段部之間，上段部的上端具有一支撐架，下段部的下端具有一承載件，上段部及中段部之間能予以彎折，中段部及下段部之間能予以彎折。第一抬腿機構連接於輔助器主體的上段部及中段部之間，第二抬腿機構連接於輔助器主體的中段部及下段部之間。輔助器主體的上段部、中段部、下段部及第一抬腿機構、第二抬腿機構皆包含有彈性緩衝機構，用以提供彈性緩衝的功能。由此，可以有效的分擔人體的重量，以減少關節的負擔，以便利於行走。
