A filling device for multi-head dosing machines (10) adapted for the weighing and dosing of food products, or the like, to be packaged, having a substantially carousel-shaped form extending vertically and comprising a plurality of dosing heads (11) wherein said dosing heads (11) are positioned in a circular fashion outside a rotatable plate (12) on which the portions are positioned, above which a frame (14) is arranged, also of the carousel type with a diameter less than the plate (12), which comprises a plurality of mechanical linkages (15) kinematically connected to a respective plurality of movable blades (16), each of which is positioned at a respective dosing head.