An automatic steering control performs an automatic parking control which
automatically steers steerable wheels of a vehicle, without requiring a
driver to perform steering wheel operation, such that the actual steering
angle of the steerable wheels follows a changing target steering angle,
whereby the vehicle is moved to a target parking state. When the actual
steering angle fails to follow the target steering angle because of
insufficiency of the steering drive force of a steering actuator, a
braking force difference imparting control is performed so as to apply a
predetermined braking force on the steerable wheel located inside a
target vehicle locus. As a result, a steering moment is generated in the
steerable wheels. This steering moment serves as a force for compensating
for the insufficiency of the steering drive force of the steering
actuator. As a result, the actual steering angle accurately follows the
target steering angle.