The invention relates to a seed drill (1) comprising a chassis (2) with a substantially horizontal transverse beam (3) over which seeding elements (4) are regularly distributed, said transverse beam (3) having a central section (5) and two lateral sections (6) arranged either side of the central section (5) in a working position and lifted substantially above said central section (5) in a transport position. Each lateral section (6) is connected to said chassis (2) by means of a respective arm (7) and can be transversely and vertically displaced in relation to said chassis (2) by means of a deformable mechanism (8) controlled by an actuating cylinder (9). The seed drill is characterised in that a deformable mechanism (8) is staggered in relation to the other deformable mechanism taking into account the direction of advancement (A).
