Introduced is a device for driving a wearable robot comprising: a base coupled to a person wearing a wearable robot； a motor prepared on a base； a ball screw rotated by the motor having screw threads formed in opposite directions on both sides； ball nuts coupled to the screw threads of the ball screw, and linearly moved to be close or far to/from each other in accordance to a rotational direction of the ball screw； supports coupled to the legs or arms of the person wearing the wearable robot； and a wire of which both ends are connected to an end of the support and the ball nuts respectively, to linearly move the ball nuts which transfers the rotational force to the supports. As such, the present invention assists in walking the person wearing the wearable robot, and maintains posture of the person.착용자와 결합되는 베이스 및 베이스에 마련된 모터； 모터를 통해 회전되며 양측에 나사산이 서로 반대방향으로 형성된 볼스크류 및 볼스크류 양측의 나사산에 결합되어 볼스크류의 회전방향에 따라 서로 가까워지거나 멀어지도록 선형이동되는 볼너트； 착용자의 다리 또는 팔에 결합되는 지지대； 및 양단이 지지대의 단부와 볼너트에 각각 연결되어 볼너트가 선형이동됨에 따라 지지대에 회전력을 전달하는 와이어；를 포함하는 착용로봇의 구동장치가 소개된다.
