A suspension device in which a knuckle for supporting a wheel is supported by arms and a damper is connected to the knuckle. A suspension device (10) is configured in such a manner that the intersection (73) between a line extended from an elastic kingpin axis (68) of a rear wheel (31) and a road surface (72) is located on the rear side, relative to the vehicle, of the ground contact center (74) of the rear wheel. The elastic kingpin axis is tilted forward relative to the vehicle and is disposed below the rotation center (32) of the rear wheel in the vertical direction. A lower connection section (81b) of a damper (18) is provided on a line (33) drawn in substantially the vertical direction from the rotation center of the rear wheel. A damper axis (84) is tilted inward in the width direction of the vehicle and tilted forward relative to the vehicle.