Stowable seat arrangement and device for storing objects under the seat for a motor vehicle and motor vehicle equipped therewith

The arrangement (1) has an under boot space (5) arranged under a floor (7) of a motor vehicle, and a stowable seat (3) moving between unfolded usage position partially outer side of the space and folded stowed position inside the space. A storage device stores objects under the seat and includes movable slides (9) in the space. Each slide moves between a position located under the seat in unfolded position and another position separated from the former position to arrange sufficient volume in the space to receive the seat in folded position.