Abstract: A seeder machine (1) having at least one seeding module towed by a tractor vehicle. Each module includes an air intake (5), a hopper (7) for storing seeds (2), a rotating plate (8) provided with a plurality of holes (9) able to retain and transport a seed (2) by suction in a unitary manner, and a dosing scoop wheel (11) synchronised with the rotating plate (8), provided with a plurality of buckets (12). The dosing scoop wheel (11) has an automatic opening and closing mechanism (16) for each bucket (12), configured to cause the closing of each bucket (12) after receiving a seed (2) coming from the rotating plate (8), and to cause the opening thereof when the respective bucket (12) adopts an inverted position, wherein the seed (2) is able to fall from a point adjacent to the level of the terrain.