A single-grain sowing device comprising: a drum rotatable about an axis of rotation, a cavity formed in the drum, wherein an end face of the cavity is delimited by a sowing disc, in which multiple sowing holes are arranged on a notional circular path at a distance to each other, a body arranged in the cavity, rotatable about an axis arranged at a distance and parallel to the axis of rotation, with one part of the surface thereof resting against the sowing disc such that, when the sowing disc rotates, same temporarily seals a respective passed sowing hole on the inside, wherein the body can be rolled out on an outer casing surface surrounding the cavity, and a pressure spring, wherein the pressure spring presses the body against the casing surface.