An object is to provide an apparatus and method for generating a hydrogen-containing liquid that are capable of generating a hydrogen-containing liquid of which the hydrogen concentration after 10 minutes exceeds 6 ppm and the hydrogen concentration after 24 hours exceeds 10 ppm. The apparatus comprises a hydrogen generating agent (11) reacting with water to generate hydrogen gas, a capsule (20) configured to be charged with the hydrogen generating agent (11) and discharge the hydrogen gas generated in the capsule (20) to external, and a container (3) configured to be charged with a liquid (L) that is an object to which the hydrogen gas generated in the capsule (20) is added. The ratio (V/W) of a volume (V ml) of the capsule (20) to a weight (W g) of the hydrogen generating agent (11) is 11.4 or less and more preferably 8.2 or less.
