NOVELTY - A hydrogen producing installation comprises reaction container with fluid chamber in which reaction fluid is accommodated, pressurizing unit which pressurizes fluid chamber, reaction material container in which hydrogen-producing reaction material stimulated by reaction fluid of fluid chamber is accommodated, emission unit which emits hydrogen produced in the reaction material container, and fluid supply path which connects the fluid chamber and reaction material of reaction container and accepts the distribution of reaction fluid.    USE - Hydrogen-producing installation for fuel cell system (claimed).    ADVANTAGE - The hydrogen-producing installation can supply the reaction fluid stably and can generate hydrogen without using complicated mechanism and motive power.    DETAILED DESCRIPTION - A hydrogen producing installation comprises reaction container with fluid chamber in which reaction fluid is accommodated, pressurizing unit which pressurizes fluid chamber, reaction material container in which hydrogen producing reaction material stimulated by reaction fluid of fluid chamber is accommodated, emission unit which emits hydrogen produced in the reaction material container, fluid supply path which connects the fluid chamber and reaction material of reaction container and accepts the distribution of reaction fluid, and opening-and-closing unit which opens the flow path of a fluid flow path when pressure of reaction material container becomes less than predetermined value. The pressure of the fluid chamber is maintained more highly than the pressure which opens opening-and-closing unit. The pressurization unit has pressurization flow path which accepts the distribution of hydrogen and non-return valve which a pressurization flow path is equipped with and accepts the distribution of hydrogen only from the reaction material container side and pressurizes fluid chamber. An INDEPENDENT CLAIM is included for a fuel cell system.    DESCRIPTION OF DRAWING(S) - The drawing shows a schematic block diagram of the hydrogen-producing installation.    Reaction chamber (2)    Workpiece (3)    Liquid feeding pipe (4)    Solution tank (5)    Hydraulic chamber (6)