Abstract: A loading and unloading apparatus comprises two superimposed conveyors (20, 40) formed by endless conveyor belts and spirally arranged in a vertical supporting frame (10). One conveyor (20) is fixed, while the other conveyor (40) is arranged in a supporting cage (30) rotatable about the vertical conveyor spiral longitudinal axis. The supporting cage (30) is arranged in rotary manner on an extendable and retractable supporting member section (111) of the cylindrical supporting member (11) carrying the supporting frame (10), so that the upper end (44) of conveyor (40) comes to rest above or below the lower end (25) of conveyor (20), in the case of a corresponding rotation of supporting cage (30).