the opening, the sliding lid being attached to the front slider at a front end thereof and to the rear slider at a rear end thereof; a front slider lifter mechanism via which the front end of the sliding lid is attached to the front slider; a rear slider lifter mechanism via which the rear end of the sliding lid is attached to the rear slider; first guiding means for lowering the rear slider lifter mechanism at an earlier stage of a rearward movement of the rear slider together with the sliding lid; and second guiding means for lowering the front slider lifter mechanism while the sliding lid is moving rearward, the first and second guiding means being provided on each of the guide rails.
Still further, there isbody slidably fitted in the guide rail; a link pivotably attached to the sliding lid at a first end thereof and pivotably attached to the sliding body at a second end thereof, the link moving between an erected position where the sliding lid is supported at the fully closed position and a flattened-out position where the sliding lid is lowered; a sliding member provided on the link so as to be brought into engagement with the control groove of the guide rail so as to hold the link at the erected position and to move via the switching path onto the upper piece so as to hold the link at the flattened-out position; and a first elastic body being provided between the sliding body and the link for