PURPOSE: To improve degree of freedom as for caster control and camber control by constituting the bush of an intermediate fitting part so as to have an axis in the longitudinal direction of a vehicle body, and arranging the axis of the bush of the intermediate fitting part so as to be inclined against the axis of the bush on the base end fitting part.

CONSTITUTION: At oscillation of a lower arm 50 around the axis B of the bush of a base end fitting part in case of a bump or the rebound, the axis A of the bush of an intermediate fitting part with which the lower end part of a shock absorber main body 21 is fitted to the intermediate part of the lower arm is changed in inclination in the three-dimensional space. Because angle variation in the longitudinal direction of the axis of a shock absorber 20 is generated, the caster angle is changed and the camber angle is also changed. Namely, degree of freedom as for caster control and camber control can be improved.