Abstract: A loading unit for air freight comprises a loading base (1), four upright walls (3, 4, 5, 25, 26) on the loading base (1) and a cover (2) on the upright walls, the walls being detachably joined to the loading base (1) and the cover (2). The loading base (1) and the cover (2) have slots (11) on their periphery in which the walls can be accommodated. The loading base (1) and the cover (2) also have upright edges (9, 10, 14, 15) which can be placed directly one on top of the other.