A paper container is provided that allows the content to be checked, prevents the content from deteriorating for a long period of time, and is excellent in, for example, storage and preservation properties. Furthermore, a paper container is provided that can be subjected to a retort sterilization process, prevents the content from deteriorating for a long period of time, and is excellent in, for example, storage and preservation properties. A paper container formed of a laminate including at least a paper layer is provided. The paper layer has a cutout part that is covered with a gas barrier laminate. The gas barrier layer of the gas barrier laminate is formed of a composition containing a neutralized product of a polymer containing at least one functional group selected from a carboxyl group and a carboxylic anhydride group, and a hydrolysis condensation product of at least one compound (L) containing a metal atom to which at least one characteristic group selected from a halogen atom and an alkoxy group has been bonded. The —COO— groups contained in the at least one functional group are neutralized at least partly with a metal ion having a valence of two or more.