Motor vehicle body for a motor vehicle

A motor vehicle body (1) for a motor vehicle with a longitudinal beam (2) and inserted with a in the longitudinal carrier (2) crash box (4) is of the longitudinal member (2) separated state narrower than two mutually opposite walls (7, 7 ') the longitudinal member (2). Thereby, the crash box (4) can be easily in the longitudinal carrier (2) insert. After mounting lateral shell portions 'of the Crashbos (4) against the walls (7, 7) (8, 8)' biased the longitudinal member (2). Thereby, the crash box (4) (2) is firmly connected to the longitudinal member.