A motor-driven conveying roller comprises a roller body which extends along a longitudinal axis, an axle element, a bearing unit for rotatably mounting the roller body in relation to the axle element, a drive motor which is arranged within the roller body and is mechanically coupled to the axle element and to the roller body for generating a torque between the axle element and the roller body, an electrical plug-in connection which is arranged in a cavity in the axle element and which comprises a plug and a socket that may be coupled to one another in a releasable manner to establish a single- to multiple-pole electrical plug-in connection, and an electrical connecting line between the electrical plug-in connection and the drive motor.