Spring-damping operations for suppressing the springing vibrations which are generated in a vehicle (1) by the input from the road surface to the wheels (20) of the vehicle (1) are performed by controlling the torque of a motor (10). The spring-damping operations are restricted or inhibited in accordance with either the state of a battery (14) such as the voltage and the temperature of the battery (14) for feeding the electric power to the motor (10), or the state of the control such as a charge/discharge feedback control which influences the electric power of the battery (14). As a result, the spring-damping operations can be restricted in the case of the state where the springing vibrations may be hard to perform properly, where the battery (14) is easily deteriorated or where an interference with another control may occur. Thus, the spring-damping operations can be executed in the state where the control of the operations is conceded, if necessary, so that the spring-damping control and other controls can be properly executed. As a result, it is possible to prevent the spring-damping control from influencing the other controls.