Abstract: A device for sowing individual seed grains spaced from each other comprises a discharge disc which constitutes the rear wall of a seed box and has suction openings for sucking the seed grains and discharges the grains seed through a discharge passage of the box. To ensure that only a single grain will be discharged at a time, the discharge disc consists of two parts, namely, a disc body which communicates with the suction fan, and a disc blade which contacts the disc body on the side facing the supply of seeds in the seed box. One part is stationary and has a guide slot, which defines the discharge path. The other part is rotatably mounted and has peripherally spaced apart entraining slots, each of which extends throughout the radial extent of the guide slot.