The present disclosure relates to a wheel unit, which comprise: a motor; a pinion gear which is fixed to a rotating portion of the motor; a wheel which includes an annular ground surface and rotates about a final gear support shaft; a final gear made of a resin, which is fixed to the wheel directly or via another member and is disposed on one side in an axial direction with respect to the wheel; a speed reduction mechanism which decelerates rotation of the pinion gear and transmits the rotation to the final gear; and a gear case which accommodates the pinion gear, the speed reduction mechanism, and the final gear; wherein a rotation support portion which rotates along with the final gear and the wheel while being supported by the gear case directly or via another member is provided between the final gear and the wheel; and when viewed from one side in the axial direction, the final gear support shaft and a motor shaft are disposed in different positions, and the motor includes a rotor magnet on an outside of an armature in a radial direction.