The invention concerns panels for making a swimming pool having a globally rectangular planar prefabricated structure (1) delimited by a peripheral frame consisting of vertical (1b) and (1c) and horizontal (1d) and (1e) wings, one of the vertical wings having, suitably distributed over its height, fixing arrangements (1f) adapted to co-operate with matching arrangements (1g) of the other wing (1b) of an adjacent panel. The matching arrangements (1f) and (1g) are selected to enable the panels to be automatically assembled after said arrangements (1f) and (1g) have been engaged under a pressure force exerted in a plane parallel to the vertical wings and to ensure tightness in combination with a profiled shape (1k) arranged over the whole length of the vertical wings (1a) and (1b) at their connecting portion with the planar surface (1a) of the structure (1).