Abstract: An openable covering structure for any desired location which is particularly well adapted for use in conjunction with a swimming pool, comprising several covering elements extending above the basin of the swimming pool and movable relative to one another. Each covering element comprises two parallel arches between which extend transparent or translucent covering plates. To make the opening operations easier and to extend the opening possibilities, each arch of a covering element has, in at least one of its front vertical faces, at least three parallel and superimposed grooves which extend over the entire length of the arch and in which are respectively fitted at least three covering plates mounted in the grooves so as to be capable of transversely sliding.