A suspension device includes: a spring provided between an upper member and a lower member; a motor provided in juxtaposition with the spring to generate power in accordance with a speed at which a movable shaft is operated, the movable shaft being movable in accordance with operations of the upper member and the lower member in an expansion-contraction direction of the spring; a power consumption circuit including a variable load circuit, the variable load circuit being configured to generate a damping force in the motor by consuming the power generated in the motor and to change the damping force; and an electronic control unit configured to control the variable load circuit such that consumed power by the variable load circuit is increased along with an increase in a speed of the movable shaft.