A concealment device apron which, in its deployed position, extends in a general extension plane and which includes: - lateral ends (20; 20') designed to scroll in lateral slides (3; 3') included by the concealing device ; - fixed slats that include lateral ends designed to scroll in the lateral slides (3; 3') of the concealing device and which, in the deployed position of the apron , extend in the general extension plane of said apron ; - means for connecting the lateral ends of at least two fixed slats of the apron to one another; - inserted between the lateral ends of this apron , at least one device for connecting two fixed slats of the apron to one another, such a connecting device including means (80; 80') for its connection to these two slats ; - complementary connecting means (50; 50') included by the fixed slats , and which are designed to cooperate with the connecting means (80; 80') included by the connecting device ; - moving slats , each inserted between two fixed slats , and which, in the deployed position of the apron , are articulated between a closed position in which such a moving slat extends in the general extension plane of the apron and an open position in which such a moving slat is inclined relative to this general extension plane and forms an angle therewith; - means for mounting such a moving slat on such a fixed slat , in an articulated manner and rotating about an axis, these mounting means including, on the one hand, articulation means equipping a longitudinal end of such a moving slat and, on the other hand, complementary articulation means , equipping a longitudinal end of such a fixed slat , designed to cooperate with the articulation means of the moving slat , characterized in that said complementary articulation means are formed by said complementary connecting means included by this fixed slat . - lateral ends (20; 20') designed to scroll in lateral slides (3; 3') included by the concealing device ; - fixed slats that include lateral ends designed to scroll in the lateral slides (3; 3') of the concealing device and which, in the deployed position of the apron , extend in the general extension plane of said apron ; - means for connecting the lateral ends of at least two fixed slats of the apron to one another; - inserted between the lateral ends of this apron , at least one device for connecting two fixed slats of the apron to one another, such a connecting device including means (80; 80') for its connection to these two slats ; - complementary connecting means (50; 50') included by the fixed slats , and which are designed to cooperate with the connecting means (80; 80') included by the connecting device ; - moving slats , each inserted between two fixed slats , and which, in the deployed position of the apron , are articulated between a closed position in which such a moving slat extends in the general extension plane of the apron and an open position in which such a moving slat is inclined relative to this general extension plane and forms an angle therewith; - means for mounting such a moving slat on such a fixed slat , in an articulated manner and rotating about an axis, these mounting means including, on the one hand, articulation means equipping a longitudinal end of such a moving slat and, on the other hand, complementary articulation means , equipping a longitudinal end of such a fixed slat , designed to cooperate with the articulation means of the moving slat , characterized in that said complementary articulation means are formed by said complementary connecting means included by this fixed slat . <EOS>