<p>Steering shaft reaction torque is estimated by steering shaft reaction torque-estimating means, and reference road surface reaction torque is estimated by reference road surface reaction torque-estimating means. After that, the obtained steering shaft reaction torque and reference road surface reaction torque are weighted. Based on the weighted result, aimed steering reaction torque is set by aimed steering reaction torque-producing means. The width and inclination of a hysteresis of the aimed steering reaction torque are each adjusted so that steering feeling is easily improved.</p>
