A screening arrangement for a window, in particular a roof window, having a supply condition and a condition of use, the screening arrangement defining, in the condition of use, a first longitudinal direction, and a second longitudinal direction, and a screening plane substantially parallel to a plane defined by the first and second directions, the screening arrangement comprising: two operating elements (71, 72) extending in the first direction, a screening body extending, in the condition of use, substantially in the screening plane between the two operating elements (71, 72); two side rails (8, 9), each extending, in the condition of use, in the second direction, each side rail (8, 9) having a track including a hollow interior and an access slot extending between a first flange and a second flange, a plurality of transverse elements having two opposite ends and extending, in the condition of use, in the first direction and being connected to the screening body, and a plurality of connecting devices connecting, in the condition of use, said plurality of transverse elements with a respective side rail (8, 9), each connecting device including a connecting clip having at least one rigid L-shaped tab (511, 512) and at least one resilient tab, characterized in that each connecting clip is able to assume - a first position, in which the at least one L-shaped tab (511, 512) is inserted into the hollow interior of said track and is in contact with the first flange while the resilient tab is outside the hollow interior, - a second position, in which the at least one L-shaped tab (511, 512) is inserted into the hollow interior of said track and the resilient tab is in contact with the second flange and is biased, and - a third position, in which the at least one L-shaped tab (511, 512) and the resilient tab are both inserted into the hollow interior of said track and the resilient tab is non-biased, and in that one connecting clip is connected to each end of each transverse element in the condition of use in such a manner that the connecting clips are able to move slightly in the first direction in the respective track. two operating elements (71, 72) extending in the first direction, a screening body extending, in the condition of use, substantially in the screening plane between the two operating elements (71, 72); two side rails (8, 9), each extending, in the condition of use, in the second direction, each side rail (8, 9) having a track including a hollow interior and an access slot extending between a first flange and a second flange, a plurality of transverse elements having two opposite ends and extending, in the condition of use, in the first direction and being connected to the screening body, and a plurality of connecting devices connecting, in the condition of use, said plurality of transverse elements with a respective side rail (8, 9), each connecting device including a connecting clip having at least one rigid L-shaped tab (511, 512) and at least one resilient tab, characterized in that each connecting clip is able to assume - a first position, in which the at least one L-shaped tab (511, 512) is inserted into the hollow interior of said track and is in contact with the first flange while the resilient tab is outside the hollow interior, - a second position, in which the at least one L-shaped tab (511, 512) is inserted into the hollow interior of said track and the resilient tab is in contact with the second flange and is biased, and - a third position, in which the at least one L-shaped tab (511, 512) and the resilient tab are both inserted into the hollow interior of said track and the resilient tab is non-biased, - a first position, in which the at least one L-shaped tab (511, 512) is inserted into the hollow interior of said track and is in contact with the first flange while the resilient tab is outside the hollow interior, - a second position, in which the at least one L-shaped tab (511, 512) is inserted into the hollow interior of said track and the resilient tab is in contact with the second flange and is biased, and - a third position, in which the at least one L-shaped tab (511, 512) and the resilient tab are both inserted into the hollow interior of said track and the resilient tab is non-biased, and in that one connecting clip is connected to each end of each transverse element in the condition of use in such a manner that the connecting clips are able to move slightly in the first direction in the respective track.