PURPOSE: To markedly improve the limit in the cornering traveling at a speed over a certain valve by detecting car speed and variablly controlling the camber of a wheel corresponding to the detected car-speed.

CONSTITUTION: A control unit 5 in utilization of a car-speed computer is connected to a car-speed sensor 6 and an actuator 4. A rear suspension 20 including the actuator 4 has a rear arm 21 and pivotally supports the inside part of the lower edge basic part of a shock absorber 23 having a coil spring 22 installed, onto the outside edge part by a shaft 25. Outside the lower-edge basic part 24, an axle receiving part 26 is pivotally supported by a shaft 27, and the receiving part 26 supports a rear hub carrier 26. A ball screw mechanism 30 is connected to the output shaft of a servounit 29 installed onto a chassis side, and said mechanism 30 is connected to a lever 28 through a link 31. Therefore, camber can be varied by revolving the servomotor unit 29 normally and reversely.