NOVELTY - A hydrogen production apparatus has a tubular light-receiving portion (440). The tubular light-receiving portion has hydrogen generation chamber and oxygen generation chamber which are extended to the longitudinal direction of tubular light-receiving portion. The hydrogen generation chamber and oxygen generation chamber are partitioned off by ion-exchange membrane. The hydrogen generation chamber has hydrogen generation dispersion containing primary electrolyte aqueous solution and hydrogen generation photocatalyst particle accommodated.    USE - Hydrogen production apparatus (claimed).    ADVANTAGE - The hydrogen is efficiently produced from water using photocatalyst.    DETAILED DESCRIPTION - A hydrogen production apparatus has a tubular light-receiving portion. The tubular light-receiving portion has hydrogen generation chamber and oxygen generation chamber which are extended to the longitudinal direction of tubular light-receiving portion. The hydrogen generation chamber and oxygen generation chamber are partitioned off by ion-exchange membrane. The hydrogen generation chamber has hydrogen generation dispersion containing primary electrolyte aqueous solution and hydrogen generation photocatalyst particle accommodated. The oxygen generation chamber has oxygen raw component dispersion component containing secondary electrolyte aqueous solution and oxygen generation photocatalyst particle accommodated. The primary and secondary electrolyte aqueous solution contain water, reduction ionic species and oxidation ionic species. The reduction ionic species and oxidation ionic species are oxidized and produced. The hydrogen generation dispersion receives the light irradiation from the outer side of light-receiving portion. By the catalytic action of hydrogen generation photocatalyst particle, the hydrogen ion in primary electrolyte aqueous solution is reduced. Hydrogen is produced. The reduction ionic species in priomary electrolyte aqueous solution are oxidized. When oxidation ionic species are produced and the oxygen raw component dispersion component receives the light irradiation from the outer side of light-receiving portion. The water in secondary electrolyte aqueous solution is decomposed and oxidized by catalytic action of oxygen generation photocatalyst particle. A hydrogen ion and oxygen are produced. The oxidation ionic species in secondary electrolyte aqueous solution are reduced. The reduction ionic species are produced. The reduction ionic species, oxidation ionic species and a hydrogen ion are moved through the ion-exchange membrane between the hydrogen generation chamber and oxygen generation chambers. An INDEPENDENT CLAIM is included for hydrogen production method.    DESCRIPTION OF DRAWING(S) - The drawing shows the schematic view of tubular light-receiving portion of hydrogen production apparatus. (Drawing includes non-English language text)    Light (100)    Conventional hydrogen production apparatus (200,300)    Tubular light-receiving portion (440)    Hydrogen separation portion or deoxygenation portion (600)    Primary hydrogen production apparatus (700)