TWI604996B

There is provided a filling-and-sealing device and a filling-and-sealing method capable of reducing an amount of use of a replacement gas used for replacing air in a container. The filling-and-sealing device 10 includes a filling machine 11 that fills a container 1 with a content fluid; a sealing machine 12 that seals the container 1 transferred from the filling machine 11 with a lid 2; a chamber 13 that covers the filling machine 11 and the sealing machine 12; a gassing system 16 that replaces, in the chamber 13, a gas in the container 1 with a carbon dioxide gas by introducing the carbon dioxide gas as a second replacement gas supplied from a tank 27; and a pre-gassing system 17 that replaces the gas in the container 1 with a first replacement gas that remains in the chamber 13 containing the carbon dioxide gas before processing by the gassing system 16.