Support apparatus includes a shaft having first and second ends, the intermediate element that is movable between the first and second ends, between the first and second ends and intermediate element comprising first and second elastic members respectively provided, and a linear potentiometer for detecting a one-dimensional position of the intermediate element, and a grip portion for transmitting a force to the intermediate element in conjunction with the movement of the upper limb or lower limb, to a force measuring sensor structure, a driving unit for changing the load applied to the intermediate element, and a control unit for controlling the drive unit, a mounting portion, a front frame disposed on the front side of the user, the front frame It is connected with, provided on the back side of a user, comprising a rear frame for supporting the driving portion, an arm for suspending a wire for connecting the force measuring sensor structure and the driving unit, and a mounting portion having a, a, the first and second elastic members, be capable of applying a load to the one-dimensional direction to the intermediate element, it measures the force applied to the intermediate element by a linear potentiometer, the control unit controls the drive unit in response to a force exerted on the intermediate element to.