To provide a sealed container allowing a crushing margin of a seal member to be managed with a simple structure.

A storage space S3 is formed in a sealed container 20 by assembling a first container formation member 31 and a second container formation member 41. A seal member 51 surrounding the storage space S3 is interposed between facing surfaces of a first container flange 34 of the first container formation member 31 and a second container flange 43 of the second container formation member 41. The sealed container 20 is formed by fastening the first container flange 34 and the second container flange 43 with a bolt 53 and a crimping nut 52. A flange 52a of the crimping nut 52 is interposed between facing surfaces of the first container flange 34 and the second container flange 43. The flange 52a comprises crushing margin management function of the seal member 51.