To provide a container that can effectively discharge inside pressure when the inside pressure is increased accompanied by the heat treatment of a contained food product.

The container includes a container body 12 and a lid body 13 for closing an opening of the container body 12. A film tape 16 is wrapped around the container body 12, and the lid body 13 to maintain the lid body 13 in a closed state. In the part of the lid body 13 covered with the film tape 16, there are provided a release valve 21 for releasing the inside pressure and convex parts 18 for securing discharge passages 19 of fluid discharged from the release valve 21.