[Problem] To produce hydrogen-containing water having a high concentration and high sustainability employing a simple constitution. [Solution] A hydrogen-containing water production apparatus is equipped with: a cold water tank (13) in which raw water is stored a fine bubble generator (16) which is arranged in the cold water tank (13) and can disperse fine bubbles in the raw water a gas supply unit (17) which can supply a mixed gas of hydrogen and carbon dioxide to the fine bubble generator (16) and a measurement unit (37) which can measure the concentration of dissolved hydrogen or carbon dioxide in the raw water in which the fine bubbles are dispersed. The mixed gas of hydrogen and carbon dioxide is subjected to a fine bubble dispersion treatment in raw water to allow hydrogen and carbon dioxide to exist in the raw water. In this manner, the dissolution of hydrogen can be promoted.
