A vehicle suspension system includes a shock absorber having a cylinder in which a fluid is sealed, a piston slidably fitted into the cylinder, a piston rod connected to the piston and extending to an outside of the cylinder and a damping force generating apparatus controlling a flow of the fluid generated by a sliding motion of the piston inside the cylinder, a suspension spring, a detector detecting a stroke position of the piston rod with respect to the cylinder and a controller controlling the damping force generating apparatus so that one of an extension side damping force and a compression side damping force is increased and other of them is reduced in proportion to the stroke position detected by the detector.