A railway vehicle in which an upper floor forming a floor is laid down on a top surface side of an underframe (2, 40), the railway vehicle comprising: a protruding part (20, 41) provided along a longitudinal direction of the underframe, on the top surface of the underframe; an elastic member (10, 21, 42) arranged along the longitudinal direction of the underframe and having a bottom surface fixed to the top surface of the underframe or a top surface of a horizontal piece of the protruding part; and a support member (15, 22, 43) fixed to a top surface of the elastic member and fixed to a bottom surface of the upper floor; wherein the protruding part and the support member are formed in such a way that the protruding part limits movement of the support member in a direction away from the top surface of the underframe; wherein the protruding part includes: a vertical piece (20a, 41a) extending in a vertical direction from the top surface of the underframe; and a protruding portion having the horizontal piece (20b, 41b) extending in a horizontal direction from a top end part of the vertical piece, wherein the support member includes: a first horizontal piece (15a, 22a, 43a) fixed to the bottom surface side of upper floor; a vertical piece (15b, 22b, 43b) extending in the direction of the top surface of the underframe from the first horizontal piece; and a second horizontal piece (15c, 22c, 43c) extending in a horizontal direction from a bottom end part of the vertical piece, and wherein the support member has the second horizontal piece inserted between the top surface of the underframe and the horizontal piece of the protruding part and is arranged in such a way that the horizontal piece of the protruding part and the second horizontal piece of the support member spatially overlap with each other in a direction perpendicular to the top surface of the underframe; characterized in that the first horizontal piece is fixed to the top surface of the elastic member, and in that the vertical piece of the support member extends in the direction of the top surface of the underframe from one end part in a width direction of the first horizontal piece. a protruding part (20, 41) provided along a longitudinal direction of the underframe, on the top surface of the underframe; an elastic member (10, 21, 42) arranged along the longitudinal direction of the underframe and having a bottom surface fixed to the top surface of the underframe or a top surface of a horizontal piece of the protruding part; and a support member (15, 22, 43) fixed to a top surface of the elastic member and fixed to a bottom surface of the upper floor; wherein the protruding part and the support member are formed in such a way that the protruding part limits movement of the support member in a direction away from the top surface of the underframe; wherein the protruding part includes: a vertical piece (20a, 41a) extending in a vertical direction from the top surface of the underframe; and a protruding portion having the horizontal piece (20b, 41b) extending in a horizontal direction from a top end part of the vertical piece, a vertical piece (20a, 41a) extending in a vertical direction from the top surface of the underframe; and a protruding portion having the horizontal piece (20b, 41b) extending in a horizontal direction from a top end part of the vertical piece, wherein the support member includes: a first horizontal piece (15a, 22a, 43a) fixed to the bottom surface side of upper floor; a vertical piece (15b, 22b, 43b) extending in the direction of the top surface of the underframe from the first horizontal piece; and a second horizontal piece (15c, 22c, 43c) extending in a horizontal direction from a bottom end part of the vertical piece, and a first horizontal piece (15a, 22a, 43a) fixed to the bottom surface side of upper floor; a vertical piece (15b, 22b, 43b) extending in the direction of the top surface of the underframe from the first horizontal piece; and a second horizontal piece (15c, 22c, 43c) extending in a horizontal direction from a bottom end part of the vertical piece, and wherein the support member has the second horizontal piece inserted between the top surface of the underframe and the horizontal piece of the protruding part and is arranged in such a way that the horizontal piece of the protruding part and the second horizontal piece of the support member spatially overlap with each other in a direction perpendicular to the top surface of the underframe; characterized in that the first horizontal piece is fixed to the top surface of the elastic member, and in that the vertical piece of the support member extends in the direction of the top surface of the underframe from one end part in a width direction of the first horizontal piece.