In order to improve an impact-absorbing crossmember which is mountable under a bumper unit of a vehicle body on a vehicle rear thereof, wherein the crossmember extends in a transverse direction running approximately parallel to the bumper unit and has support elements arranged at the ends for support on support regions of the vehicle rear, and wherein the support elements are connected to one another by a central unit of the crossmember, in such a way that the crossmember can be produced as simply as possible and thus as cost-effectively as possible, it is proposed that the central unit has a box-shaped structure comprising wall elements and that at least one of the wall elements of the box-shaped structure has extensions which extend in one piece from the box-shaped structure into the support elements and form a structural element of the support elements.

An energy-absorbing device for a vehicle is disclosed. The energy-absorbing device includes a main direction of elongation, an external face intended to receive an impact, a core made of an energy-absorbing material, and a plastic structure that forms a one-piece entity with the core. The core is of a corrugated shape with a succession of crests in a direction of extension parallel to the main direction of elongation. The plastic structure includes means of attaching the energy-absorbing device to an element of a vehicle which is to be protected. The external face is formed at least in part by crests of the corrugated shape of the core.

An energy-absorbing device for a vehicle is disclosed. The energy-absorbing device includes a main direction of elongation, an external face intended to receive an impact, a core made of an energy-absorbing material, and a plastic structure that forms a one-piece entity with the core. The core is of a corrugated shape with a succession of crests in a direction of extension parallel to the main direction of elongation. The plastic structure includes means of attaching the energy-absorbing device to an element of a vehicle which is to be protected. The external face is formed at least in part by crests of the corrugated shape of the core.