Rolling stock

A rolling stock including a coupler at a center lower portion of each of a front end and a rear end of a car body formed by joining an underframe, side structures, end structures, and a roof structure, wherein

• a center beam provided in a front-rear direction at a center of the underframe in a width direction is formed of an upper plate part, a lower plate part, and a pair of side plate parts located on opposite sides of the upper plate part and the lower plate part into a rectangular tube cross-sectional shape,
• each of the upper plate part and the lower plate part is formed by placing a plurality of plate members on each other,
• at least an outermost one of the plate members is formed in a flat plate shape, and
• a ridge portion projecting to a tube inner side is formed in a center portion, in the width direction, of the plate member located on an inner side such that the ridge portion is continuous in a longitudinal direction of the center beam.