Modular sectorised filtering element consisting of a flat modular filter element whose surface has at least two concentric strips, the stacking of which forms a filter surface. This module allows the sectorised filtration of the fluid passing through it, with the possibility of the same filter surface also having parts dedicated simultaneously to filtration, washing, different degrees of filtration, etc. It is composed of an outer perimeter strip (1) with a zig-zag groove (4), an intermediate perimeter strip (2) with holes (6), which have radial walls (7), and concentric separation walls (8) of a stackable shape, and an inner perimeter strip (3) with a configuration similar to the outer strip (1).