A fastening device for fastening a plate element, in particular a door or wall lining, on a carrier, in particular a body part of a motor vehicle, can take a preassembly position and a final assembly position. The fastening device includes a connecting element (10), which can be connected with the plate element and defines an axial mounting direction (A). The fastening device further comprises an engaging part (12) for locking the fastening device behind an opening of the carrier. Both the connecting element (10) and the engaging part (12) have integrally formed functional elements, which in the preassembly position directly cooperate with associated functional elements or regions of the engaging part (12) and with associated functional elements or regions of the connecting element (10), respectively.