To reduce the number of part items and weight, to need to secure only relatively small storage space and to improve turning round property at the beginning of turning and maneuvering stability at the time of rolling by making stabilizer arms concurrently serve as radius-rods.

A pair of stabilizer arms 23, 23 with the front ends pivotally fixed to a chassis frame 16 are disposed divergently toward the rear ends from the top view. These stabilizer arms serves as radius-rods. Both ends of a stabilizer bar 24 extended in the cross direction of a vehicle are respectively connected to the rear ends of a pair of stabilizer arms 23, 23, and this stabilizer bar 24 is rotatably held by an air spring support means 19 for supporting an air spring 18 of a rear axle.