A railway vehicle damping device comprises at least two front side actuators interposed between a front bogie and a vehicle body of a railway vehicle, and at least two rear side actuators interposed between a rear bogie and the vehicle body of the railway vehicle, and suppresses vibration in a yaw direction of the vehicle body using a yaw suppression force generated by the actuators. After determining that the railway vehicle is traveling in a curve section, a control device causes at least one of the front side actuators and at least one of the rear side actuators to generate a yaw suppression force, and causes all of the remaining actuators to function as passive dampers. As a result, passenger comfort in the railway vehicle during travel in the curve section is improved.