An opening roller assembly for an open-end spinning device of a textile machine, wherein an opening roller (12) is mounted on a bearing shaft (17) which is fixed in a bearing bracket (14) of an opening roller housing (11) in such a manner that the shaft can be easily removed. A drive (28) for rotating the opening roller is provided by a single electrical motor formed as an external rotor. A contact lead device (18) is mounted on the bearing shaft and includes leads (19) which are connected to the electrical motor, and a contact shoe housing (50) is provided which includes contact shoes or contact pins (21) which are connected to a power supply (27) of a corresponding textile machine and which can be selectively brought into contact with the leads (19) of the contact lead device (18).