NOVELTY - The hydrogen-producing apparatus (10) has reaction chamber (14), hydrogen-producing source injection unit, and exhaust passage (31). The reaction chamber stores water, alcohol, or their liquid mixture. The hydrogen-producing source injection unit injects the hydrogen-producing source containing formulation (1) to the reaction chamber. The hydrogen-producing source containing formulation contains hydrogen-producing source which generates hydrogen. The exhaust passage discharges the hydrogen produced in the interior of reaction chamber to the exterior portion.    USE - Hydrogen-producing apparatus is used for electric power generation system (claimed).    ADVANTAGE - The hydrogen-producing apparatus controls the amount of hydrogen-production easily, and controls production rate of hydrogen by simple method.    DETAILED DESCRIPTION - The hydrogen-producing apparatus (10) has reaction chamber (14), hydrogen-producing source injection unit, and exhaust passage (31). The reaction chamber stores water, alcohol, or their liquid mixture. The hydrogen-producing source injection unit injects the hydrogen-producing source containing formulation (1) to the reaction chamber. The hydrogen-producing source containing formulation contains hydrogen-producing source which generates hydrogen by decomposition reaction with liquid mixture currently stored by reaction chamber. The exhaust passage discharges the hydrogen produced in the interior of reaction chamber to the exterior portion. The hydrogen-producing source containing formulation is included in the casing in which the hydrogen-producing source is formed from a soluble material with respect to the liquid currently stored by the reaction chamber.    DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view of the electric power generation system. (Drawing includes non-English language text)    Hydrogen-producing source containing formulation (1)    Hydrogen-producing apparatus (10)    Reaction chamber (14)    Exhaust passage (31)    Electric power generation system (100)