Modular filter for wood dusts and shavings. The FM filtering unit is the most economical and less bulky solution for filtering dusts that require a large filtering surface (e.g. polishing wood). Obviously, the FM dust collector is always valid for filtering small amounts of sawdust and small shavings where the use of mini-silos or containment silos is not requested. Modularity: the FM filters are built in prefabricated galvanised panels easily assembled in standard modular units respectively of 1 mt (FM 1), 2 mt (FM 2), 3 mt (FM 3), 4 mt (FM 4) and 5 mt (FM 5). Given this peculiar feature of the FM, they are totally modular, thus allowing to contain relative transport costs.