A moving belt conveyor comprising: - a transport belt having two faces (12A, 12B), one of the faces, called the transport face, being intended to receive products transported by the conveyor, - two reversing rollers (14, 16), the belt being curved into a loop defining two ends, each end engaged around a respective reversing roller (14, 16), the forward run being intended to transport products, the transport face on the forward run being turned upward and the transport face on the return run being turned downwards, - at least one roller located on the return run, in contact with the transport face, and intended to support the return run, the roller (22, 24) comprising an outer layer provided to be in contact with the transport belt and having a first hardness, the outer layer comprising polyurethane, the roller further comprising an intermediate layer extending under the outer layer, characterized in that the intermediate layer has a second hardness less than the first hardness and the outer layer has a roughness of between 0.001 milimeters and 0.01 millimeters, and in that the outer layer and the intermediate layer form an outer lining of a single part, sheath-like, in that the roller (22, 24) comprises a central armature, the intermediate layer being interposed between the central armature and the outer layer, and in that the outer lining has a diameter slightly less than the central armature so that the central armature is configured to be force-fitted in the outer lining. - a transport belt having two faces (12A, 12B), one of the faces, called the transport face, being intended to receive products transported by the conveyor, - two reversing rollers (14, 16), the belt being curved into a loop defining two ends, each end engaged around a respective reversing roller (14, 16), the forward run being intended to transport products, the transport face on the forward run being turned upward and the transport face on the return run being turned downwards, - at least one roller located on the return run, in contact with the transport face, and intended to support the return run, the roller (22, 24) comprising an outer layer provided to be in contact with the transport belt and having a first hardness, the outer layer comprising polyurethane, the roller further comprising an intermediate layer extending under the outer layer, characterized in that the intermediate layer has a second hardness less than the first hardness and the outer layer has a roughness of between 0.001 milimeters and 0.01 millimeters, and in that the outer layer and the intermediate layer form an outer lining of a single part, sheath-like, in that the roller (22, 24) comprises a central armature, the intermediate layer being interposed between the central armature and the outer layer, and in that the outer lining has a diameter slightly less than the central armature so that the central armature is configured to be force-fitted in the outer lining. the roller (22, 24) comprising an outer layer provided to be in contact with the transport belt and having a first hardness, the outer layer comprising polyurethane, the roller further comprising an intermediate layer extending under the outer layer, characterized in that the intermediate layer has a second hardness less than the first hardness and the outer layer has a roughness of between 0.001 milimeters and 0.01 millimeters, and in that the outer layer and the intermediate layer form an outer lining of a single part, sheath-like, in that the roller (22, 24) comprises a central armature, the intermediate layer being interposed between the central armature and the outer layer, and in that the outer lining has a diameter slightly less than the central armature so that the central armature is configured to be force-fitted in the outer lining.