Abstract: The present invention relates to a filling device for heterogeneous products or products which have solid or semi-solid suspended elements with variable dimensions and compactness. The valve of the invention can be used in net weight filling machines. In particular, the invention relates to a filling device (1) for filling machines, comprising a hollow body (2) in which a shutter member (3) is movably fitted and acts in cooperation with a dispensing member (4), which is coaxial to said shutter member (3), to close or open a dispensing opening (5) for a product (P) to be dispensed into a container (C), characterized in that said dispensing member (4) comprises a rotatable shaft (10) comprising a screw portion (14) adapted to impart a dispensing pressure and a mixing to the product (P).