Device for protecting objects stored in a motor vehicle rear deck

The invention relates to a protective device ( 8 ) comprising a panel ( 9 ) forming the vertical limit between a protected zone ( 10 ) of the rear boot ( 2 ) used to receive the objects ( 7 ) and accessible when the rear boot ( 2 ) is open from the rear forward, and a second zone ( 11 ) of the rear boot ( 2 ) used to receive the roof ( 1 ) in a folded, stored position and located above the protected zone ( 10 ), the panel ( 9 ) being moveable between a low protecting position and a high protecting position. The invention is characterised in that the panel ( 9 ) co-operates with a first sensor ( 14 ) to prevent the roof ( 1 ) from being folded when the panel ( 9 ) is above the low protecting position, and with a second sensor ( 15 ) to prevent the boot ( 2 ) from being closed when the panel ( 9 ) is above the high protecting position.