NOVELTY - A hydrogen production apparatus has a molded material (23) comprising a porous ceramic substrate (27), a hydrogen separation layer (29) formed on surface-layer side or surface of porous ceramic substrate, and which selects and permeates hydrogen, and a porous ceramic protective layer (31) formed on hydrogen separation layer, and a molded material (25) comprising a modification-catalyst substance which generates reformed gas which modify source gas and contains hydrogen. The surface of porous ceramic protective layer of molded material (23) is provided towards molded material (25).    USE - Apparatus is used for producing hydrogen for e.g. fuel cell.    ADVANTAGE - The hydrogen production apparatus has high capability to separate hydrogen from source gas. The hydrogen production apparatus is economically manufactured. The damage to hydrogen separation layer of hydrogen production apparatus is prevented.    DETAILED DESCRIPTION - A hydrogen production apparatus has a molded material (23) comprising a porous ceramic substrate, a hydrogen separation layer formed on surface-layer side or surface of porous ceramic substrate, and which selects and permeates hydrogen, and a porous ceramic protective layer formed on surface of hydrogen separation layer, and a molded material (25) comprising a modification-catalyst substance which generates reformed gas which modify source gas and contains hydrogen. The surface of porous ceramic protective layer of molded material (23) is provided towards molded material (25). The molded material (23) and molded material (25) are separate materials. At least one portion of surface of molded material (25) is contacted with surface of porous ceramic protective layer of molded material (23).    DESCRIPTION OF DRAWING(S) - The drawing shows the sectional view of the hydrogen production apparatus.    Molded materials (23,25)    Porous ceramic substrate (27)    Hydrogen separation layer (29)    Porous ceramic protective layer (31)    Clearance gap (33)