To provide a power assisted winch apparatus smoothly movable against overload by a moved body since equipment such as electric wiring must not be installed.

This power assisted winch apparatus is a manual windup winch in which the rotating shaft of a winding drum for winding up a wire rope is rotated through a handle or a manual winch in which the rotating shaft of a moving drum for moving a wire rope installed in an endless state is rotated through a handle. The manual winch comprises a power unit for directly or indirectly driving the rotation of the rotating shaft.