A heating device for a food item in a food container includes the food container that contains the food items), a cooking container that contains the food container, and a steam generation device that supplies steam into the cooking container. The food container has an opening hole that communicates with an internal space and an external space, and at least one of a food surrounding space provided between an inner wall of the food container and the food items, and between the food items. The food surrounding space and the external space are communicated with each other through the opening hole, and steam is supplied into the cooking container to heat the food items by the steam. Thereby, the heating device for a food item in a food container that can subject the food item in the cooking container to steam heating can be provided.
