NOVELTY - The installation (1) has a supply port (4) provided at the side wall of a reaction chamber (2), to supply the reaction solution (6) from a solution container (5). The hydrogen generation reaction-material (3) contained in the reaction chamber contacts the supply port side. A compression helical spring (32) presses the hydrogen generation reaction-material on the supply port side through a load board (11). A discharge port (8) of the reaction chamber discharges the hydrogen generated by the hydrogen generation reaction-material reacting with the reaction solution.    USE - For fuel cell system (claimed) used for power supply of mobile phone and digital camera.    ADVANTAGE - The hydrogen is generated by a minimum reaction solution, in which the product cannot retain in the hydrogen generation reaction-material by a low volume.    DETAILED DESCRIPTION - The hydrogen generation installation comprises a pump (7) to pump the reaction solution from the solution container to the reaction chamber. A differential-pressure supply unit supplies the reaction solution to the reaction chamber based on the pressure difference when the internal pressure at the side of reaction chamber is low with respect to the internal pressure of the solution container. A groove of spiral form is formed in the surface of the hydrogen generation reaction-material contacting the supply port side of the reaction chamber. A spacer is provided between the supply port and the hydrogen generation reaction-material. The hydrophilic processing and water-repellent processing are performed to the spacer such that the circumference side of the hydrogen generation reaction-material fastens to the wall surface of the reaction chamber.    DESCRIPTION OF DRAWING(S) - The figure shows a block diagram of the fuel cell system provided with the hydrogen generation installation.    Hydrogen generation installation (1)    Reaction chamber (2)    Hydrogen generation reaction-material (3)    Supply port (4)    Solution container (5)    Reaction solution (6)    Discharge port (8)    Load board (11)    Compression helical spring (32)