NOVELTY - The hydrogen-production apparatus has unit container (2) provided on a base (22). The container accommodates cylindrical-shaped electrochemical cell (1), water-vapor inlet tube (6), hydrogen pole electric-power-feeding portion (12), and oxygen electrode electric-power-feeding portion (13). The hydrogen electrode electric-power-feeding portion electrically feeds to hydrogen pole (9) on inner surface of electrochemical cell. The oxygen electrode electric-power-feeding portion electrically feeds to oxygen electrode (11) on outer surface of electrochemical cell.    USE - Apparatus for producing hydrogen.    ADVANTAGE - The hydrogen-production apparatus electrically feeds electrochemical cell simply and reliably, accommodates electrochemical cell in unit container easily, reduces contact resistance in connection portion and loss of electrical energy, and improves efficiency of hydrogen production.    DETAILED DESCRIPTION - The hydrogen-production apparatus has unit container provided on a base. The container accommodates cylindrical-shaped electrochemical cell, water-vapor inlet tube, hydrogen pole electric-power-feeding portion, and oxygen electrode electric-power-feeding portion. The electrochemical cell is made of ceramics and is installed on base by connecting top piping to upper portion of cell, and lower piping to lower portion of cell. The water-vapor inlet tube introduces water-vapor into tube of electrochemical cell. The hydrogen electrode electric-power-feeding portion electrically feeds to hydrogen pole on inner surface of electrochemical cell. The hydrogen pole is used as cathode. The oxygen electrode electric-power-feeding portion electrically feeds to oxygen electrode on outer surface of electrochemical cell. The oxygen electrode is used as anode. An INDEPENDENT CLAIM is included for method for assembling hydrogen-production apparatus.    DESCRIPTION OF DRAWING(S) - The drawing shows longitudinal cross-sectional view of hydrogen-production apparatus.    Electrochemical cell (1)    Unit container (2)    Water-vapor inlet tube (6)    Hydrogen pole (9)    Oxygen electrode (11)    Hydrogen pole electric-power-feeding portion (12)    Oxygen electrode electric-power-feeding portion (13)    Base (22)