The invention concerns a front panel (10) comprising a top metal section (12) extending over the whole width of the panel and provided with means for fixing it to the motor vehicle structural elements, and a metal support (16) provided with means (18, 20) for fixing it to other structural elements or fittings of the vehicle. The section and the support are separate parts, mechanically interlocked by a plastic material (22) jointly overmoulded on the section and the support. Said structure enables in particular the use of sections with closed cross-section, such as extruded or hydroformed sections. The support (16) consists in particular of a centre jamb including means (18, 20) for being fixed to a hood lock and to a cowl-beam of the vehicle.