An aircraft cargo loader includes a first generally horizontal platform structure adjustable in height between ground level and a first elevated position. The loader includes a second generally horizontal platform structure positioned adjacent to the first generally horizontal platform structure and adjustable in height relative to the first platform structure. A third generally horizontal platform structure is positioned adjacent to the second generally horizontal platform structure and is adjustable in height relative to the first and second generally horizontal platform structures. The aircraft cargo loader may include additional platform structures and one or more may be carried by a vehicle.