A freeze storage container is desired which has such freeze resistance that it does not break even at -196°C, which is the temperature of liquid nitrogen, can be molded in a relatively small wall thickness, and has excellent heat sealability. A freeze storage container comprising an adhesive fluoropolymer film is provided. This freeze storage container enables blood, scare cells, or a biotissue to be stored in an extremely-low-temperature environment, without breaking. The container can prevent liquid nitrogen from coming thereinto. It can prevent contamination by the bacteria, viruses, or the like present in the liquid nitrogen. Furthermore, it is free from the trouble that a freeze storage container breaks upon thawing due to the expansion of the liquid nitrogen which has come into the container.
