The invention relates to a distributor for a seed spacing drill including a casing of overall cylindrical shape inside which is rotationally mounted, on a horizontal axis, a distributor disc 18 provided with orifices which are spaced circumferentially, which disc separates a seed container 6 from a suction device provided with an element 38 for adjusting the suction so that the orifices are subjected to a partial vacuum for retaining the seeds taken from the receptacle for at least part of their angular displacement; means for removing twin seeds, consisting of a deflector member 58, 66, 72 and, at the lower part of the casing, an opening for discharging the seeds. The distributor according to the invention includes a lever 40 controlling both the element 38 for adjusting the suction and the deflector member 58. <IMAGE>
