FILLING SYSTEM

A filling system includes a liquid tank for storing liquid; a compressor for pressurizing the inside of the liquid tank; a filling head having a seal member adapted to be pressed against a mouth of a vessel and filling the liquid to the vessel through a liquid passageway while the mouth of the vessel is sealed by the seal member; a liquid valve provided in the liquid passageway; a gas passageway connecting a headspace of the liquid tank to the vessel; a gas valve provided in the gas passageway; a snifting passage connecting the vessel to the outside; and a flowmeter for detecting the amount of liquid supplied to the vessel. When the liquid is a non-fizzy liquid, the liquid valve is opened while the liquid tank is pressurized, the gas valve is closed and the snifting valve is opened.