Abstract: A unit (100) for filling containers (2) with products (1), in particular pharmaceutical products (1), includes a hopper (3, 3a) containing a mass of products (1) in bulk, conveying means (5, 6) aimed at feeding the products (1) leaving the hopper (3) along a predetermined path (P) up to a station (SR), where the containers (2) are filled with the products (1). The containers (2) are fed to the filling station (SR) by transporting means (4, C). A checking station (SC) for checking the products (1) is situated along the path (P) upstream of the filling station (SR). The conveying means (5, 6) include first means (51, 52, 53) consisting of vibrating planes and second conveying means (6). The second conveying means (6) are situated at the checking station (SC) between the conveying/vibrating planes (51, 52, 53) and the filling station (SR).