PROBLEM TO BE SOLVED: To provide a hydrogen-containing gas inhalation apparatus capable of highly efficiently inhaling hydrogen-containing gas and/or taking in hydrogen in the body, and an operation method of the hydrogen-containing gas inhalator.SOLUTION: A hydrogen-containing gas inhalation apparatus 1 includes: a pressurized vessel 10, the inside of which is set into pressurized environment, and hydrogen-containing gas supply means 30 for supplying the hydrogen-containing gas to the inside of the pressurized vessel 10. In a state where the inside of the pressurized vessel 10 is set to the pressurized environment, the hydrogen-containing gas is supplied to the inside of the pressurized vessel 10. The hydrogen-containing gas includes, for example, 0.01 vol% or more hydrogen (H).SELECTED DRAWING: Figure 1【課題】 水素含有ガスの吸入、及び／又は、水素の体内への摂取を効率よく行うことが可能な水素含有ガス吸入装置及び水素含有ガス吸入装置の動作方法を提供する。【解決手段】 内部を加圧環境にすることができる加圧容器１０と、加圧容器１０内に水素含有ガスを供給する水素含有ガス供給手段３０を有する水素含有ガス吸入装置１。加圧容器１０の内部を加圧環境とした状態で、加圧容器１０内に水素含有ガスを供給する。水素含有ガス中は、例えば、０．０１ｖｏｌ％以上の水素（Ｈ２）を含有する。【選択図】 図１
