A railway car comprising a steerable truck having a truck frame which rotatably supports a front wheelset positioned on a front side of the truck frame in the direction of travel and a rear wheelset positioned on a rear side in the direction of travel through axle boxes, and a truck frame steering unit for controlling a steering angle of at least the rear wheelset when traveling along a curved track in the direction of travel, characterized in that when the truck is traveling along a curved track, (a) the truck frame is steered so as to be aligned with the tangential direction of the curved track and/or (b) the yawing angle (φ) of the truck frame, which is the angle formed in a horizontal plane between the radial direction of the curved track and the centerline in the forward and backward direction of the truck frame, is decreased, by controlling the steering angle of the rear wheelset by the truck frame steering unit so that the steering angle of the rear wheelset is larger than the steering angle of the front wheelset, wherein the steering angle of the front and rear wheelsets (1f, 1r) is defined as the angle between an imaginary straight line connecting the center of the truck frame and the center of a circular arc defined by the curved track in a horizontal plane and the centerline of the front and rear wheelset (1f, 1r), respectively, wherein control of the steering angle of the rear wheelset by the truck frame steering unit is carried out by a link mechanism mounted on the truck frame, and wherein the link mechanism comprises: steering levers, each of which connecting the truck frame and the car body, second links, each of which connecting a respective one of the steering levers and an axle box which rotatably supports the rear wheelset, first connection points, each of which connecting a respective one of the steering levers and the car body and being used as a fulcrum, second connection points, each of which connecting a respective one of the steering levers and a respective one of the second links and being used as a point of effort, and third connection points, each of which connecting the truck frame and a respective one of the steering levers and being used as a point of load. (a) the truck frame is steered so as to be aligned with the tangential direction of the curved track and/or (b) the yawing angle (φ) of the truck frame, which is the angle formed in a horizontal plane between the radial direction of the curved track and the centerline in the forward and backward direction of the truck frame, is decreased, steering levers, each of which connecting the truck frame and the car body, second links, each of which connecting a respective one of the steering levers and an axle box which rotatably supports the rear wheelset, first connection points, each of which connecting a respective one of the steering levers and the car body and being used as a fulcrum, second connection points, each of which connecting a respective one of the steering levers and a respective one of the second links and being used as a point of effort, and third connection points, each of which connecting the truck frame and a respective one of the steering levers and being used as a point of load.