Disclosed is a metering unit for granular material with a conveyor disk driven by a drive motor and rotating approximately concentrically to an inner cover surface of a housing. The conveyor disk has a recess for the reception of at least one grain to be separated via at least one revolution of the conveyor disk. In the interaction with a groove-shaped and/or slanted profile of the inner cover surface, the recess forms a conveyor pocket for conveying one grain or a plurality of grains in the direction toward an outlet opening extending approximately tangentially from the inner cover surface. For varying an axial distance to the inner cover surface and/or a width of the conveyor pocket, the conveyor disk, which is rotationally fixedly connected with the drive motor, is adjustable in the axial direction of the drive motor.
