Abstract: A unit for processing microbiological samples has a conveyor for transporting samples, for example in microtitre plates. At a processing station, samples for processing are transferred in their sample containers from the transport device to a processing device, which can have several processing areas, of which only one is ever in a processing position. A manipulating device is associated with the processing position. A magazine dispenses sample containers for processing. An incubator accumulates and discharges sample containers using transport and storage arrangements with coupleable conveyors on multiple levels.