Modular filter for wood dusts and shavings. The MFM filtering unit is the most economical and less bulky solution in absolute for filtering dusts that require a large filtering surface (e.g. polishing wood). Obviously, the MFM dust collector is always valid for filtering small amounts of sawdust and small shavings to the point of requesting use of mini-silos or containment silos. Modularity: the MFM filters are built in prefabricated galvanised panels easily assembled in standard modular units respectively of 1 mt (MFM 1), 2 mt (MFM 2), 3 mt (MFM 3), 4 mt (MFM 4) and above. Given this peculiar feature of the MFM, they are totally modular, thus allowing to contain relative transport costs.