A railway vehicle steering truck comprising: axle boxes that rotatably support a steering axle; a steering device having a steering lever rotatably connected to a truck frame; a steering link rotatably connected to an axle box portion relative to the steering lever; a connecting link rotatably connected to a vehicle body portion; the steering lever being rotatably connected to the connecting link and the steering link characterized in that a stopper is installed both at a side where a wheelbase of the truck expands and at a side where the wheelbase of the truck contracts in the truck, and in that according to one of (a) and (b) (a) the respective axle box is supported in a front-back direction along a vehicle moving direction by the steering link of the steering device and the steering device is mounted at each steering axle at each of the respective axle boxes; the stopper is configured to come in contact with the axle box which supports the steering axle, when a front-back movement of the axle box exceeds a range of front-back movement at a time of maximum steering when passing through a minimum curve; and the stopper is installed such that the magnitude Y of the gap between the axle box and the stopper when passing through a minimum curve is set at a value lower than the magnitude X of the front-back movement of the axle box of the steering axle when passing through a minimum curve; and (b) two axle boxes among the axle boxes arranged in a front-back direction of a vehicle moving direction on the same side along a vehicle width direction are supported in a front-back direction along a vehicle moving direction by a single steering device; the stopper is configured to come in contact with the axle box so that a magnitude of a front-back movement of the axle box with respect to the truck is not greater than a front-back movement at a time of maximum steering when passing through a minimum curve; and the stopper is installed such that the magnitude Y of the gap between the axle box and the stopper is substantially zero when passing through a minimum curve. axle boxes that rotatably support a steering axle; a steering device having a steering lever rotatably connected to a truck frame; a steering link rotatably connected to an axle box portion relative to the steering lever; a connecting link rotatably connected to a vehicle body portion; the steering lever being rotatably connected to the connecting link and the steering link characterized in that a steering lever rotatably connected to a truck frame; a steering link rotatably connected to an axle box portion relative to the steering lever; a connecting link rotatably connected to a vehicle body portion; the steering lever being rotatably connected to the connecting link and the steering link characterized in that a stopper is installed both at a side where a wheelbase of the truck expands and at a side where the wheelbase of the truck contracts in the truck, and in that according to one of (a) and (b) (a) the respective axle box is supported in a front-back direction along a vehicle moving direction by the steering link of the steering device and the steering device is mounted at each steering axle at each of the respective axle boxes; the stopper is configured to come in contact with the axle box which supports the steering axle, when a front-back movement of the axle box exceeds a range of front-back movement at a time of maximum steering when passing through a minimum curve; and the stopper is installed such that the magnitude Y of the gap between the axle box and the stopper when passing through a minimum curve is set at a value lower than the magnitude X of the front-back movement of the axle box of the steering axle when passing through a minimum curve; and (b) two axle boxes among the axle boxes arranged in a front-back direction of a vehicle moving direction on the same side along a vehicle width direction are supported in a front-back direction along a vehicle moving direction by a single steering device; (a) the respective axle box is supported in a front-back direction along a vehicle moving direction by the steering link of the steering device and the steering device is mounted at each steering axle at each of the respective axle boxes; the stopper is configured to come in contact with the axle box which supports the steering axle, when a front-back movement of the axle box exceeds a range of front-back movement at a time of maximum steering when passing through a minimum curve; and the stopper is installed such that the magnitude Y of the gap between the axle box and the stopper when passing through a minimum curve is set at a value lower than the magnitude X of the front-back movement of the axle box of the steering axle when passing through a minimum curve; and (b) two axle boxes among the axle boxes arranged in a front-back direction of a vehicle moving direction on the same side along a vehicle width direction are supported in a front-back direction along a vehicle moving direction by a single steering device; the stopper is configured to come in contact with the axle box so that a magnitude of a front-back movement of the axle box with respect to the truck is not greater than a front-back movement at a time of maximum steering when passing through a minimum curve; and the stopper is installed such that the magnitude Y of the gap between the axle box and the stopper is substantially zero when passing through a minimum curve.