PURPOSE: To limit excessive displacement of an anti-inclination rod by limiting length of a jack through an adjuster when an end part of the anti-inclination rod is striking an adjacent part corresponding to wheel operation stoppage in which an angle of the steering wheel is close to the maximum.
CONSTITUTION: An anti-inclination rod 10 is installed on a car body 1 through a fixed bearing 13 in a crossing direction to a length direction axial line of a vehicle to be capable of pivotally movable, and a sensor 18 to detect an angle position of one end 9 of the anti-inclination rod 10 connected to a rod 8 of a jack 6, and a sensor 19 to detect an angle position of a wheel support 2 are provided. Sensors 16, 17, 18, 19 are connected to a computer 21, and when one end 9 of the anti-inclination rod 10 strikes a peripheral part or an adjacent part corresponding to operation stoppage of wheels RD, RG in which an angle of a steering wheel V is close to the maximum, a computer 21 limits the size of motion of the jack 6 through an adjuster 15.