A conveyor device includes at least three lift columns, a lower conveyor body, and an upper conveyor body. The upper conveyor body is adjustable in its height relative to the lower conveyor body. The lift columns project at least partially above the upper conveyor body without lengthwise supports acting in the transport direction. The upper conveyor body together with one or more cross members on which the upper conveyor body is supported may be formed as a modular unit which is mountable and removable from the conveying system as a unit.