Bumper beam

A bumper beam for a vehicle, which at least in attachment regions (20) of said bumper beam is of generally U-shaped cross-section with a crown (12-16) pointing outwards, said crown including a central flange and two webs extending from said central flange in a direction towards said vehicle, characterised in that the crown has a larger profile height than profile width at the attachment regions and a smaller profile height than profile width at a longitudinal central portion of said bumper beam such that the profile height of the bumper beam is larger at the attachment regions than at the longitudinal center, said bumper beam being oriented asymmetrically in a vertical direction relative to the longitudinal direction of extension of said bumper beam, and said bumper beam has in each said attachment region (20) a single transverse metal bulkhead (25) fastened between sides (12,13) of the crown and running generally in the longitudinal direction of the vehicle for reducing tilting of the bumper beam relative to the vehicle when the bumper beam is subjected to an impact force during a collision, each said transverse bulkhead being attached to said webs and arranged such that an intermediate portion of each said transverse bulkhead is curved inwardly away from at least one of said webs and does not directly abut against said at least one of said webs for initiating deformation of said transverse bulkhead during a collision.