A suspension device 1 includes a damper D having an extension-side chamber R1 and a compression-side chamber R2, an air spring A that exerts a resilient force in the direction in which the damper D is extended, and a control unit C that independently adjusts the pressures in the extension-side chamber R1 and the compression-side chamber R2 to control the force exerted by the damper D. The control unit C causes the damper D to exert the balance force Fb that counters the resilient force of the air spring A within a predetermined stroke range of the air spring A.