The present invention relates to a distribution box (1) for a single-seed seed drill with a disc (4) provided with radial grooves (5) which are evenly spaced and open at the periphery of said disc (4), said disc (4) being mounted to rotate on a horizontal axis (4a) and separating a seed reservoir (6) from a suction device (7) so that the seeds are picked up from the reservoir (6) by said disc (4) using the stream of air at a depression and are held over at least part of their angular travel until they are expelled from a discharge opening (8). The box is notable in that each groove (5) has a suction hole (10) of a size smaller than that of the seeds that are to be distributed, said suction hole (10) opens onto a canal (11) of a width smaller than the diameter of the suction hole (10), said canal (11) is open as far as the periphery of the disc (4). The present invention also relates to a single-seed seed drill with at least one distribution box according to the invention.
