The utility model relates to the cage systems for keeping and raising poultry, primarily broiler chickens. Multi-tiered cage system for keeping and raising poultry contains a multi-tiered frame, drinking and feeding systems mounted on each tier of the frame, multi-tiered belt conveyor, the unloading device. The system is characterized in that the unloading device is comprised of a lateral guides mounted on vertical metal support racks of frame on each tier parallel to the conveyor belt motion line above the level of the conveyor belt and below the floor level of the cage sections throughout the tier of the frame and one or two boxes installed under each cage section or under separate cage sections on the conveyor belt moving freely along the lateral guides. Preferred embodiments of the poultry unloading device envisage specific positions of the lateral guides, the possibility of installing central guides and having the guides in the boxes to install floors of the cage sections into them.