The present invention relates to a joint assisting tool worn on a user&primes body and reducing burden applied to his/her lumbar vertebrae or joint by expanding and compressing an elastic member when he/she bends or straightens his/her upper body or knee. The joint assisting tool comprises: a wearing part worn on the waist part of a user&primes body connection parts disposed in both lower sides of the wearing part, and fixed to a hip joint part a rotation part coupled with the connection part through a rotation axis, having one side equipped with a fan-shaped rotation piece, and having the other side worn on the user&primes body in an upper side of the wearing part, so the rotation part is rotated when the user bends or straightens his/her upper body or knee and an elastic part including an elastic member installed therein with an upper side coupled with the rotation piece, having a lower side fixed to the front of the thigh part, and reducing burden applied to the lumbar vertebrae or the joint when the rotation part is rotated. According to the present invention, the joint assisting tool is produced in a relatively simple structure, so production may be easily performed and production costs are saved. While power is not directly applied to the joint, energy consumed for lumbar vertebrae or joint activities is assisted, so burden applied to the joint can be reduced. When the joint assisting tool is worn on a user, an angle for connecting the left and the right thereof can be adjusted, so the joint assisting tool can be applied to individual movements of the left and the right of the user&primes body. By adjusting tension of an elastic member, the joint assisting tool can be effectively used corresponding to the height or weight of a wearer.COPYRIGHT KIPO 2016본 발명은 신체에 착용되어져 상반신 또는 무릎을 굽히거나 펴는 동작시 탄성부재의 팽창과 압축을 통해 요추 또는 관절에 가해지는 부담을 경감시키는 관절보조기구에 관한 것으로, 신체의 허리부위에 착용되는 착용부 상기 착용부의 하부 양측에 구성되어 고관절부위에 고정되는 연결부 상기 연결부와 회전축으로 결합되고, 일측에 부채꼴 형상의 회전편이 형성되며, 타측이 상기 착용부의 상측에서
