Provided is a camber angle controlling device capable of reducing an energy consumption while retaining the running performance of a vehicle. A camber angle applying device (4) is controlled to adjust the camber angle of wheels (2) to a predetermined value.Therefore, the characteristics (or a high gripping property) of a high gripping force and the characteristics (or a low rolling resistance) ofa small rolling resistance can be separately used as the performance of the wheels (2). By utilizing the high gripping property of the wheels (2), therefore, a vehicle (1) is enabled to reduce its energy consumption, while retaining its running performances (such as a turning performance, an accelerating performance or a braking performance), by utilizing the rolling resistance of the wheels (2).Moreover, the camber angle applying device (4) is controlled to make the rolling resistance of the wheels (2) lower, so that the energy loss to occur in the wheels (2) at the running time can be madeso lower as to reduce the energy consumption of the vehicle (1) further.