To provide a food packaging container in which unevenness in heating is hard to occur in microwave heat-cooking.

This packaging container is used for a food which is heat-cooked by a microwave heater, and a plurality of rows of ridges are symmetrically provided from a vicinity of the center of the bottom section to the outside into a radial shape on the rear surface of the container bottom section. In this case, the summits of the ridges are set to be located on the same plane. The ridges are provided in such a manner that the central side end sections of the ridges and the bottom section central point are isolated by a specified distance. Thus, a uniform heating over the whole container becomes possible.