Abstract: A bumper reinforcement includes end portions and an intermediate portion, wherein the bumper reinforcement is made of a light alloy extruded material including a hollow cross-section and is configured to be arranged at a vehicle, the bumper reinforcement is configured to be assembled on and supported by a supporting member at each of the end portions bent toward a vehicle body side, the hollow cross-section includes a closed cross-section at the intermediate portion and includes an open cross-section provided with an opening at each of the end portions, each of the end portions is formed in a manner that a thickness of the hollow cross-section thereof in a vehicle front-rear direction is gradually reduced toward an end, and each of the openings is configured to be at least partially closed with a connecting portion of the supporting member and is restricted from being expanded.

Abstract: A vehicle bumper apparatus includes a bumper reinforcement member formed to have a hollow cross section and including a vehicle interior portion formed to have an open cross section including an opening, and a crush box supporting the bumper reinforcement member to mount the bumper reinforcement member to a side member of a vehicle body, the crush box including a connecting portion arranged at a vehicle exterior portion, the connecting portion closing the opening of the bumper reinforcement member to restrict the opening from being expanded, and a retaining portion protruding from the connecting portion toward an exterior side of a vehicle to retain the bumper reinforcement member.