NOVELTY - A hydrogen production apparatus comprises hydrogen-producing substance container (1) which accommodates hydrogen-producing substance (10), water container (2) which accommodates water, water supply part (1b) for supplying water to hydrogen-producing substance container from water container, hydrogen leading-out part for leading-out hydrogen from hydrogen-producing substance container, gas-liquid separation part (7) for separating water from mixture containing hydrogen and water, and water collection part for collecting water separated in gas-liquid separation part to water container.    USE - A hydrogen production apparatus used as hydrogen supply source for fuel cell (claimed).    ADVANTAGE - The apparatus obtains hydrogen simply and efficiently.    DETAILED DESCRIPTION - A hydrogen production apparatus comprises hydrogen-producing substance container (1) which accommodates hydrogen-producing substance (10), water container (2) which accommodates water, water supply part (1b) for supplying water to hydrogen-producing substance container from water container, hydrogen leading-out part for leading-out hydrogen from hydrogen-producing substance container, gas-liquid separation part (7) for separating water from mixture containing hydrogen discharged from hydrogen-producing substance container and water, and water collection part for collecting water separated in gas-liquid separation part to water container. The water container will be sealed when water is supplied to hydrogen-producing substance container so that inside of water container may be pressure-reduced while having inflexibility. The water collection part sucks water from gas-liquid separation part and collects water to water container by pressure-reducing water container.    DESCRIPTION OF DRAWING(S) - The drawing shows a partial cross-sectional schematic view of hydrogen production apparatus.    Hydrogen-producing substance container (1)    Water supply part (1b)    Water container (2)    Gas-liquid separation part (7)    Hydrogen-producing substance (10)