Abstract: A collapsible cargo container for aircraft. The container comprises a base and roof preferably constructed from aluminum and flexible side walls formed from light weight fabric. The roof is releasably supported in the erected position by foldable support posts which extend upwardly from each comer of the container base. The roof is vertically slidable relative to the support posts between the erected position and a collapsed position proximate to the base. In the collapsed position, the flexible walls are stowed between the base and the roof. The support posts are pivotably coupled to the base and may be folded to a collapsed position resting on an upper surface of the roof. The container may further include a pallet extension to conform to the dimensions of below-deck aircraft cargo holds.