In order to provide a suspension which is inexpensive and light in weight and which can attain substantially improved vehicle-riding comfort without lowering drivability, an axle is hanged from a chassis side (side rails) by resilient supports (leaf and air springs) with different spring characteristics arranged forwards and rearwards of the axle. The axle 1 is allowed to make rolling motion due to difference in spring characteristic between the forward and rearward resilient supports.