WHEEL MODULE AND DRIVE DEVICE INCLUDING SAME

An embodiment provides a wheel module comprising: a body; a connection part which is rotatably coupled to the body, the connection part being rotatable in a first direction; a wheel body which is rotatably coupled to the connection part, the wheel body being rotatable in a second direction; and a wheel part which is arranged to be spaced apart from the wheel body and has an auxiliary tread portion having selectively adjustable internal pressure.