The invention relates to a device for assembling or disassembling rows of parcels such as boxes and stacking or de-stacking these rows of parcels into or from a space, such as a container. The device of the invention comprises a transport conveyor to maneuver goods from or to the space, a stacking conveyor (300) positioned adjacent to the transport conveyor to align the parcels in a row or to break up a row of parcels, a pusher system (500) associated with the stacking conveyor (300) to push the row of parcels of the stacking conveyor, a loading arm (200) for sending and/or receiving, for transferring and stacking the row of parcels pushed off the stacking conveyor (300) in the space or pick a row of parcels from the space and transfer this row of parcels to the stacking conveyor (300).