This drive device is provided with a motor section (2) and a wheel (102) which is connected to the output section (44) of the motor section (2) and which rotates. The wheel (102) has a circular plate-shaped disk section (104) which is affixed to the output section (44), and a rim section (105) which extends in the axial direction of the output section (44) from the outer periphery of the disk section (104) and on which a tire (103) is mounted. The disk section (104) is provided with a rib (116) surrounding the periphery of the motor section (2).