A control unit configured to control a control force generating device configured to generate a control force for damping a sprung portion of a vehicle controls the control force generating device based on a target control force Fcit for damping the sprung portion when a wheel passes through a predicted wheel passing position. The control unit acquires an unsprung displacement z1i at the predicted wheel passing position, and calculates the target control force as a value proportional to an unsprung displacement z1ai that is the unsprung displacement z1i having a phase that has been advanced to advance a phase of a transfer function from the unsprung displacement z1i to the target control force by a phase advance amount larger than 0 degrees and smaller than 180 degrees.