NOVELTY - The apparatus has an isolation portion (5) that isolates hydrogen producing tank, and a photocatalyst tank (1). The photocatalyst tank accommodates a photocatalyst (20) and water by separating the interior space of hydrogen-producing tank (10). A light source tank (2) accommodates a liquid light source (30). The isolation portion comprises a material which permeates light emitted using liquid light source. Corrugated shape is formed in one surface of the isolation portion. The diameter of the corrugation is larger than the wavelength of the light emitted using the liquid light source.    USE - Apparatus for producing hydrogen used for petroleum refining, industrial commodity and fuel cell.    ADVANTAGE - The light is effectively irradiated in the surface of the photocatalyst which has complicated structure. The generation efficiency of hydrogen is improved. The reflection of light from the light source is effectively prevented.    DETAILED DESCRIPTION - The apparatus has an isolation portion that is comprised with corrugated shape in one surface without gap. The corrugated shape is comprised with a sloping surface in the unit plane of the isolation portion. The isolation portion is comprised with a flow path which is connected with the liquid light source. The liquid light source is comprised with photogen distributed to the liquid. The luminous material is dispersed to the liquid and chemiluminescent solutions. The photocatalyst is positioned at the inner wall of the photocatalyst tank of hydrogen-producing tank. The photocatalyst is carried by the to-be-adhered portion fixed to the inner wall and in which the corrugation is formed. The photocatalysts are particles dispersed to the water. The inflow port is configured to take in the liquid light source into the light source tank from the exterior. The outflow port is configured to flow out the liquid light source of the light source tank. Hydrogen output opening is configured to output the hydrogen generated inside. An adjustment tank is configured to adjust the liquid light source to the state in which light emission is possible. The liquid light source is configured to disperse the photogen to the liquid. The adjustment tank is comprised with cultivation tank which cultivates the photogen. The photogen is light emission bacteria and luminous plankton. The photocatalyst is classified into the photocatalyst for hydrogen generation and the photocatalyst for oxygen generation.    DESCRIPTION OF DRAWING(S) - The drawing shows a block diagram of the hydrogen production apparatus.    Photocatalyst tank (1)    Light source tank (2)    Isolation portion (5)    Hydrogen-producing tank (10)    Photocatalyst (20)    Liquid light source (30)