A vehicle test device 100 is to test performance of a vehicle (V) or a part of the vehicle(V) by rotating a wheel (W) placed on a rotating body 11 in order to reproduce an actually running state of the vehicle (V) by controlling rotational speed of the wheel (W) so as to make the rotational speed equal to a target value accurately, and a rotation related value that indicates rotational speed of the wheel (W) or torque applied to the wheel (W) is obtained, and the rotational speed of the rotating body 11 or the torque applied to the rotating body 11 is controlled so as to make the rotation related value equal to a predetermined target value.
