Support structure for motor vehicles, which consists predominantly of multi-walled lightweight construction panels in a sandwich construction, or the like. With plane-parallel broad sides, and a supporting floor (10), which merges at the front in the footwell area (12) in an upwardly projecting end wall (14), and with a one crumple zone forming front-end structure (24) in the region of the end wall (24) is supported and extending in the vehicle vertical direction and in the vehicle transverse direction lightweight panels comprising, characterized in that the footwell area (12) is limited in light-weight construction, side and top of a plate assembly (20) together with the bottom (10) and the end wall (14) forms a composite of flat lightweight panels support box (22) for the front-end structure (24).