The present invention is provided with a hand rim, wheels that rotate in response to torque applied to the hand rim, and a drive control unit for applying auxiliary power to the wheels in accordance with the torque applied to the hand rim. The drive control unit decelerates the rotation of the rotating wheels, in the absence of torque applied to the hand rim, by executing a braking mode in which braking torque working in a direction opposite the rotational direction of the wheels is applied to the wheels.
