The invention concerns a filtering structure (1) designed to be incorporated in one of the nominally vertical walls of a swimming pool, and comprising filtering means and pumping means (6) consisting of an electrical part including in particular an electric motor (7) and a hydraulic part (8) equipped with a turbine, said structure comprising a suction port (3) facing towards a nominally horizontal access passageway (12) partly submerged in the water, and emerging towards a nominally vertical tank (13) arranged thereunder and wherein are arranged the filtering means, said tank communicating with a nominally vertical column (15), partly in the upper part of which is arranged the hydraulic part (8) of the pumping means (6). The invention is characterized in that the electrical part of the pumping means (6) is arranged above the level of the water to be treated contained in the nominally horizontal access passageway (12), while the hydraulic part of the same pumping means (6) is immersed in the volume of filtered water.