The invention relates to an open-end rotor spinning device (3) with a spinning rotor (19) which can be driven by a single motor, the rotor assembly (17) of which rotates in a rotor housing (10) which can be pressurized and which is driven by a drive (21) for the spinning rotor (19) and bearing arms (27) ) is connected to a cover element (22) having a fiber band dissolving device (30), and which comprises a part of a centering device (40), wherein the forwardly open rotor housing (10) is closed by the cover element (22) during the spinning process , which in turn has a receptacle (23) for a replaceably arranged channel plate adapter (24). According to the invention, the centering device (40) is formed by a guide surface (36) arranged on the channel plate adapter (24), as well as a guide device (31) arranged on the rotor housing (10), wherein the guide surface (36) arranged on the channel plate adapter (24) Closing state of the open-end rotor spinning device (3) in a form-fitting manner with the guide device (31) arranged on the rotor housing (10).