To provide a suspension device for a vehicle and provided with a damping device with a simple constitution capable absorbing fine vibration and a damping device.

The suspension device 1 for a vehicle is provided with a body including a coil spring 13 and a damper 15, is interposed so as to connect an axle 3 and a car body and damps the vibration transmitted from the axle 3 to the car body. The damping device 1 includes a plurality of flat springs arranged so as to be curved and expanded/contracted in a transmission direction of the vibration; a plurality of piezoelectric elements arranged with one surface fixed to both of front and back surfaces of the flat spring so as to absorb at least one part of stress generated on the flat spring expanded/contracted by the vibration transmitted from the axle 3 to the car body and convert it to an electric energy; and a means for releasing the electric energy generated on the piezoelectric elements.