PURPOSE: To make the rigidity of a suspension device low in the vertical and longitudinal directions and extremely high in the lateral direction, rolling direction and yaw angle direction, and the like.

CONSTITUTION: A suspension member 2 for supporting a suspension arm 1 oscillatingly is fitted, in the rear area thereof, to a body by elastic bodies 3, 4, and supported, in the front area thereof, at a body side bracket 7 through a first and a second supporting members 5, 6. The shaft body 5a of the first supporting member 5 is rotatably connected to the front area supporting part 2a of the suspension member 2, and the shaft body 6a of the second supporting member 6 is rotatably connected to the body side bracket 7. The tip of the oscillating body 5b of the first supporting member 5 is rotatably connected to the tip of the oscillating body 6b of the second supporting member 6. The shaft body 5a of the supporting member 5 is connected to the shaft body 6a of the second supporting member 6 through elastic members 8, 9.