Provided is a device for strengthening muscle or moving the weight, which can be used as rehabilitation sporting equipment for strengthening muscle of arms by having a simple structure and being removable from the arm, and can lift heavy objects to the certain height. The device for strengthening muscle or moving the weight comprises: upper arm/lower arm boards (10, 20) fixing arms a fixing link (50) installed on the lower arm board (20) and forming a pivot point first and second rotational links (60, 70) respectively installed to be rotatable on the upper arm board (10) and the fixing link (50) a latch gear installed in the first rotational link (60) and a latch closure (110) installed in the fixing link (50) and interlocked with the latch gear (100).본 발명은 전체적인 구조가 간단하고 팔에 탈부착이 가능함에 따라 팔의 근력 강화 재활 운동기구로 사용할 수 있으며, 특히 무거운 물건을 일정높이로 들어올릴 수 있는 근력 강화 또는 중량물 이동 장치를 제공한다.
