A railcar includes: a carbody; a bogie constituting member including an interface plate provided at a lower portion of the carbody, an air spring, and a bogie; an automatic level controlling valve configured to maintain a height of the spring within a certain range; a first attaching portion provided on a side surface of the plate, the valve being detachably attached to the side surface of the plate by the first attaching portion; and attaching means provided at the lower portion of the carbody, the valve being detachably attached to the lower portion of the carbody by the attaching means, the bogie constituting member being separable from the carbody in a state where the valve is attached to the side surface of the plate through the first attaching portion or a state where the valve is attached to the lower portion of the carbody through the attaching means.