A motor-driven wheel includes a wheel disc, a wheel hub, a knuckle, a hub
bearing, a constant-velocity joint, an in-wheel motor, and a spring. The
center of swing of the constant-velocity joint is placed closer to the
outside of the vehicle relative to the hub bearing. Since such components
of the constant-velocity joint as an inner race, balls and a cage are
placed differently in position from the hub bearing, the hub bearing can
be reduced in diameter. An outer race of the constant-velocity joint is
integrated with the wheel hub into a single part and has an opening
facing the outside of the vehicle. Since the opening is large and
shallow, the work of installing the cage, balls and inner race and
securing them with a snap ring is facilitated.