Seat with an object-holding chamber for an automotive vehicle

A seat with an object-holding chamber for an automotive vehicle, which seat has the chamber (2) fixed beneath it and has on its lower portion a trim panel (1), interrupted on its front portion for passage of the chamber. The chamber (2) and panel (1) have in the intersection area faceing surfaces provided with pre-mounting means including guide members and clamping members ensuring the relative positioning between both components.