a resin molding includes an elongate body and a bent end that is continuous with the elongate body and is formed by a pressing operation . a back side of an intersecting portion of the elongate body and the bent end has reinforcing ribs formed by resin melted during the pressing operation . the resin molding is formed by extruding a melted resin , cutting the extruded resin into a predetermined length to form an intermediate product , heating and pressing an end of the intermediate product to bend the end , and introducing a melted resin onto the intermediate product during the pressing to form at least one reinforcing rib thereon to support the bent end .