When supplied with a signal for correcting a vehicle behavior is input from a brake controller, an electrically-driven parking brake controller releases actuation of an electrically-driven parking brake when the electrically-driven parking brake is actuated. When supplied with a brake control amount when abnormality occurs in a main brake system is input the electrically-driven parking brake controller drives electric motors to generate the brake control amount concerned. Furthermore, when supplied with the brake control amount of the electrically-driven parking brake 30 from an ACC system, the electrically-driven parking brake controller drives the electric motors to generate the brake control amount concerned. The front-and-rear driving force distribution controller directly couples the front shaft and the rear shaft when the electrically-driven parking brake is actuated.