To provide a content storage container which is suitable to preserve contents for a long time and can keep the state immediately after reception for a long time, and a method of manufacturing the container.

After a souvenir A selected by a presenter is housed in a container body 2 at an event site, an upper lid 3 is fitted in the opening 2a of the container body 2. The container body 2 is sealed in an approximately airtight manner by a portable compact sealing machine 5 carried into the event site to make the approximately can-formed content storage container 1 with the souvenir A housed therein.