A braking band of a disc for disc brake of the ventilated type, - said braking band extending between an inner diameter, close to a rotation axis (X-X) of the braking band, and an outer diameter, far from said rotation axis (X-X), said rotation axis defining an axial direction (X-X); - said braking band defining a radial direction (R-R) substantially orthogonal to said axial direction (X-X), and a circumferential direction (C-C) orthogonal both to said axial direction (X-X) and to said radial direction (R-R); - said braking band comprising two plates (3, 4) facing each other; - said plates (3, 4) comprising inner surfaces (5, 6) directly or indirectly facing each other and delimiting a gap; - said plates (3, 4) comprising outer surfaces (8, 9); - said outer surfaces (8, 9) comprising opposite flat circumferential portions which form braking surfaces (10, 11); - said plates (3, 4) comprising a plate body (12, 13) having an extension in axial direction (X-X) or thickness of plate (14, 15); - said plates (3, 4) being joined to each other by heat dissipation elements or connecting elements (16, 17, 18, 19); - said connecting elements (16, 17, 18, 19) being shaped as columns and/or ribs protruding from one plate towards the opposite plate in the shape of connecting bridges of the plates (3, 4); wherein - at least one of the plates (3; 4) comprises at least one projection (20, 21, 22) projecting from said plate (3; 4) into said gap without reaching the opposite plate (4; 3), thus forming at least one localized narrowing of said gap and a thickening of the plate body (12; 13), thus creating a localized increase of said thickness of plate (14; 15); and wherein - said at least one projection (20, 21, 22) extends at least from a first connecting element (16, 17, 18, 19) to an adjacent connecting element (16, 17, 18, 19), thus connecting said connecting elements (16, 17, 18, 19); and wherein - said at least one projection (20, 21, 22) extends at least along said circumferential direction (C-C) connecting at least two adjacent connecting elements (16, 17, 18, 19) placed side-by-side in circumferential direction (C-C); characterised in that the group of each projection (20, 21, 22) extends circumferentially along a discontinuous annular path, avoiding a uniform distribution in circumferential direction. - said braking band extending between an inner diameter, close to a rotation axis (X-X) of the braking band, and an outer diameter, far from said rotation axis (X-X), said rotation axis defining an axial direction (X-X); - said braking band defining a radial direction (R-R) substantially orthogonal to said axial direction (X-X), and a circumferential direction (C-C) orthogonal both to said axial direction (X-X) and to said radial direction (R-R); - said braking band comprising two plates (3, 4) facing each other; - said plates (3, 4) comprising inner surfaces (5, 6) directly or indirectly facing each other and delimiting a gap; - said plates (3, 4) comprising outer surfaces (8, 9); - said outer surfaces (8, 9) comprising opposite flat circumferential portions which form braking surfaces (10, 11); - said plates (3, 4) comprising a plate body (12, 13) having an extension in axial direction (X-X) or thickness of plate (14, 15); - said plates (3, 4) being joined to each other by heat dissipation elements or connecting elements (16, 17, 18, 19); - said connecting elements (16, 17, 18, 19) being shaped as columns and/or ribs protruding from one plate towards the opposite plate in the shape of connecting bridges of the plates (3, 4); - at least one of the plates (3; 4) comprises at least one projection (20, 21, 22) projecting from said plate (3; 4) into said gap without reaching the opposite plate (4; 3), thus forming at least one localized narrowing of said gap and a thickening of the plate body (12; 13), thus creating a localized increase of said thickness of plate (14; 15); and wherein - said at least one projection (20, 21, 22) extends at least from a first connecting element (16, 17, 18, 19) to an adjacent connecting element (16, 17, 18, 19), thus connecting said connecting elements (16, 17, 18, 19); and wherein - said at least one projection (20, 21, 22) extends at least along said circumferential direction (C-C) connecting at least two adjacent connecting elements (16, 17, 18, 19) placed side-by-side in circumferential direction (C-C); characterised in that the group of each projection (20, 21, 22) extends circumferentially along a discontinuous annular path, avoiding a uniform distribution in circumferential direction.