Wheel drive motor and in-wheel motor drive assembly

A wheel drive motor, comprising:

• a motor shaft, for outputting drive force to rotate a wheel, extending in an axial direction and including a large diameter portion located at a central part in the axial direction and a small diameter portion located on a first side in the axial direction, the small diameter portion having a diameter smaller than that of the large diameter portion, a bearing rotatably supporting the small diameter portion, and a rotor secured to an outer circumferential surface of the large diameter portion and facing a stator, wherein an end part of the rotor located on the first side in the axial direction projects over an end face of the large diameter portion located on the first side in the axial direction toward the side on which the small diameter portion is.