Filtering panel 100 for passively adsorbing micro particles such as atmospheric pollutants or the like, the panel having a first outer layer 10, a second outer layer 30 and an intermediate filtering layer 20 arranged between the first and second outer layers 10 and 30, the intermediate filtering layer 20 having a support structure impregnated with porous active carbons, where at least one of the outer layers 10 and 30 is optionally suitable for painting and/or coloring and/or printing, the panel 100 being therefore suitable for use for displaying information and/or directions, for example of an advertising or commercial nature, as well as an urban, extra-urban and domestic design element.