Seed drill with a supply container and with a frame which has a coulter-holding rail equipped with seed coulters, the seed drill having to be equipped, for its use alone, with an undercarriage which is provided with running wheels and with coupling devices for mounting on a three-point power lift of a tractor, and being capable of being coupled, without an undercarriage, by means of easily releasible upper and lower coupling devices, to a ground-working combination, consisting of a ground-working machine with ground-working implements and a ground roller arranged behind the ground-working implements, the supply container of the seed drill being located above the ground roller, the coulter-holding rail being arranged close behind the ground roller on the frame of the seed drill, the lower coupling devices being located between the frame of the seed drill and the ground roller, and the upper coupling device being arranged between the seed drill and the ground-working machine. In order to improve the lower coupling device between the seed drill and a ground-working combination, the lower coupling device (13) is arranged on the frame (3) of the seed drill (1) and on the ground-working machine (15). <IMAGE>
