An air cargo shipping container comprising a rectangular base of molded synthetic resin material which is chemically inert to most substances, the base having a plurality of legs formed in its bottom for supporting the base above the ground. These legs are spaced for entry of the lifting tines of a forklift or the like and each leg is hollow and open at its upper end thus defining a plurality of reservoirs on the inside of the base for confining spilled cargo. The base has an integral lip around its periphery which extends up above the level of the base. The container further has three panels hingedly secured to the lip for swinging between a generally vertical, erect position and a generally horizontal, folded position in which the panels overlie the base, and a fourth or front panel. The vertical edges of adjacent panels are releasably secured together and the front panel is readily removable from the base and from the adjacent side panels so as to enable loading and unloading of the container. The container further includes a lid engageable with the upper edges of the panels to close the container. The front panel, when removed from the base, is stowable on the base, and the lid is cooperable with the base to enclose the hinged panels when in their folded position and the front panel between the base and the lid so as to permit shipment of empty containers in a knock-down configuration.