Abstract: A belt conveyor comprising an endless conveyor belt driven by a drive and having an upper and a lower part, the conveyor belt being provided near at least one edge with a detaining assembly which engages a guide and which are locked by this guide against displacement in the direction away from the guide. According to the invention the detaining assembly is in engagement with guide discs which are rotatably supported adjacent the conveyor belt and which forms the guide, while the drive engages the detaining assembly and drive the conveyor belt through the detaining assembly.