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.