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.