Mounting structure for mounting a cockpit module on a vehicle body, said structure comprising: - at least one mounting element (18, 19) fixed to the cockpit module, - at least one lateral vehicle body element (8, 9) positioned so as to cooperate with a mounting element (18, 19), - at least one guide mechanism configured to guide the displacement of the cockpit module relative to the vehicle body into a retained position, said guide mechanism comprising a guide pin arranged in an element selected from a lateral vehicle body element (8, 9) or a mounting element (18, 19), and a corresponding guide channel arranged on the other element, mounting element (18, 19) or lateral vehicle body element (8, 9), - at least one guide mechanism being associated with each mounting element (18, 19), whilst the guide channel of each guide mechanism is rectilinear and extends parallel to the longitudinal direction of the vehicle in the mounted position of the cockpit module, so as to guide the cockpit module in a rectilinear movement parallel to the longitudinal direction of the vehicle into the retained position, the guide channel of each guide mechanism comprising at least one stop designed to immobilize the guide pin in the retained position, the stop comprising a guide surface on which the guide pin is able to slide during the movement thereof into the retained position, said guide surface extending away from a rectilinear wall of the guide channel in the direction of the retained position, and a planar surface perpendicular to the direction of displacement of the guide pin, characterized in that the guide pin comprises a planar surface which is configured to cooperate with the planar surface of the stop. - at least one mounting element (18, 19) fixed to the cockpit module, - at least one lateral vehicle body element (8, 9) positioned so as to cooperate with a mounting element (18, 19), - at least one guide mechanism configured to guide the displacement of the cockpit module relative to the vehicle body into a retained position, said guide mechanism comprising a guide pin arranged in an element selected from a lateral vehicle body element (8, 9) or a mounting element (18, 19), and a corresponding guide channel arranged on the other element, mounting element (18, 19) or lateral vehicle body element (8, 9), - at least one guide mechanism being associated with each mounting element (18, 19), whilst the guide channel of each guide mechanism is rectilinear and extends parallel to the longitudinal direction of the vehicle in the mounted position of the cockpit module, so as to guide the cockpit module in a rectilinear movement parallel to the longitudinal direction of the vehicle into the retained position, the guide channel of each guide mechanism comprising at least one stop designed to immobilize the guide pin in the retained position, the stop comprising a guide surface on which the guide pin is able to slide during the movement thereof into the retained position, said guide surface extending away from a rectilinear wall of the guide channel in the direction of the retained position, and a planar surface perpendicular to the direction of displacement of the guide pin, characterized in that the guide pin comprises a planar surface which is configured to cooperate with the planar surface of the stop.