Abstract: The invention relates to a motor vehicle seat crossmember comprising: a tubular base body and receptacle section arranged on the base body for the torsion-free arrangement of a coupling element. In order to provide a motor vehicle seat cross-section that can be economically produced and that has a low weight and a high strength, it is provided that the receptacle section has a reinforcing tube that is arranged coaxial to the base body and lies on its inner or outer surface, and a cross-section deviating from a circle that is produced by joint deformation, especially cold formation, of the base body and the reinforcing tube.