A control device for controlling a variable damper of a wheel suspension system includes a first sensor detecting a first dynamic state variable of a vehicle body, a damping force base value determining unit determining a target damping force base value, a second sensor detecting a second dynamic state variable of the vehicle body; a correction value determining unit determining a damping force correction value, and a target damping force determining unit determining a target damping force. When the differential value of the lateral acceleration is relatively high (or the target damping force is high), a drive current to the variable damper is increased. The same is true when the vehicle is undergoing a pitching movement. The target damping force may be obtained by subtracting the damping force correction value from the target damping force base value.