PURPOSE: To conduct stable travelling by driving a first actuator to negate influence of centrifugal force upon a vehicle body when the vehicle travels on a curve section, and driving a second actuator to negate influence of lateral direction force upon the vehicle body when the vehicle travels on a straight line section.

CONSTITUTION: Right and left single-acting oil pressure cylinders 9 being first actuators are connected to a first solenoid valve 20 while a double-acting oil pressure cylinder 11 being a second actuator is connected to a second solenoid valve 25. A control device 40 extends/contracts the oil pressure cylinders 9 in accordance with centrifugal force, a track cant and vehicle weight to tilt the vehicle body 8 around the longitudinal direction with respect to wheels 3 side so as to negate influence of the centrifugal force, when a vehicle 1 travels on a curve section. The device 40 extends/contracts the oil pressure cylinder 11 in accordance with a signal from an acceleration sensor 46 to move the vehicle 8 in the lateral direction so as to negate influence of lateral direction force upon the vehicle body 8.