FUEL GAS SUPPLYING/FILLING SYSTEM

The present invention provides a fuel gas supplying and filling system for a fuel gas consuming unit, the fuel gas supplying and filling system being capable of using a supply passage in both filling and supplying operations and improving the airtightness and reliability of a fill passage without increasing components. In a fuel gas supplying and filling system 1, a high-pressure tank 3 and a fuel gas consuming unit 2 are connected to each other by a supply passage 4, and an electromagnetic pressure regulating valve 6 is provided on the supply passage 4. Moreover, an electromagnetic on-off valve 7 is provided between the electromagnetic pressure regulating valve 6 and the high-pressure tank 3. Further, a fill passage 51 is connected to a portion of the supply passage 4, the portion being located between the electromagnetic pressure regulating valve 6 and the electromagnetic on-off valve 7. The fill passage 51 is configured such that the high-pressure fuel gas can be supplied through a filling opening. When the high-pressure fuel gas is introduced to a downstream side of the electromagnetic on-off valve 7, the electromagnetic on-off valve 7 opens the supply passage 4, which has been closed by the electromagnetic on-off valve 7.