Abstract: A gas charging device includes a housing section (61), a gas charging section (62), a lid (64) and an opening member (65). The housing section houses a gas ejection device (1) provided with a gas container (5) and an operating member (9) for opening/closing the gas container. The gas charging section is formed with a supply duct (68) for supplying the gas and a discharge duct (69) for discharging the gas and is faced by one end of the housing section (61). The lid may hermetically seal the gas charging section (62). The operating member may be engaged with the operating member (9) to open the gas container (5). The gas charging section (62), in the housing section (61) of which the gas ejection device (1) is housed, is hermetically sealed by the lid (64), and the gas container (5) of the gas ejection device (1) is opened by the opening member (65).