To provide secureness of maneuvering stability to an input longitudinal to a vehicle and maintenance of comfortableness simultaneously in high dimensions.

A lower arm 13 of a double wishbone type suspension device consists of a lateral lower arm 14 whose one end is rotatably supported by a knuckle 12 and a compression arm 15 whose one end is rotatably connected with the intermediate part of the lateral lower arm 14. In this case, by separating a longitudinal input from a transverse input, absorbing displacement to the input longitudinal to a vehicle at a supporting point of the knuckle 12 of the compression arm 15, reducing an input to the lateral lower arm 14, and reducing transverse displacement of the knuckle 12, comfortableness and maneuvering stability are improved, and therefore, secureness of maneuvering stability to an input longitudinal to the vehicle and maintenance of comfortableness are provided simultaneously in high dimension.