To provide a high-pressure gas container valve 10 capable of restraining a screw part from being damaged by a scuffing phenomenon.

A cylinder part 12 is formed in an upper side of a container valve body 11 of the high-pressure gas container valve 10, and a plug 13 is provided screwedly in the cylinder part 12. A gas flow passage 19 with, for example, hydrogen chloride or the like flowing therethrough is formed in a lower side of the container valve body 11, and the gas flow passage 19 is opened and closed by turning the plug 13. A male screw part 30 screwed in and contacting a high-pressure gas container 20 is plasma-nitrided in the high-pressure gas container valve 10 constituted by this manner, and a nitrogen diffusion layer is formed thereby on a surface thereof.

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