Abstract: A sowing device for discharging metered quantities of seed, fertilizer or the like grains is characterized in that the metering device is provided with one or more exchangeable cellular wheels (17), that the housing (16) of the metering device, which accommodates the cellular wheel (17) is designed axially symmetrical at both opposing faces in relation to the driving unit, the bearing and the assembly of the metering device and the fastening thereof, and has a removable shaft (18), that the housing (16) is designed without bearing, and at least one driving unit (22) with bearing and/or at least one bearing unit (24) is coupled thereto, that the shaft (18) in the form of a plug-on or slip-on shaft is supported in the driving and/or bearing unit(s), and that the driving and/or the bearing unit can be plugged, screwed or similarly attached to the housing (16).