The frame (1) comprises a chassis (2a,2b) provided with a plurality of sowing elements (4) of said seeder, and it is characterized in that said chassis (2a,2b) comprises a plurality of support arms (3) of said sowing elements (4), said support arms (3) being disposed substantially parallel in a same horizontal plane, each sowing element (4) of said support arms (3) determining a sowing line of said seeder, said arms (3) comprising at least one portion (3a) susceptible of being horizontally unfolded from a transport position to an expanded working position. The seeder comprises the frame and makes it possible to modify the working width of the machine at the same time guaranteeing a width for transport of no more than three metres.
