To provide a production method of a photocatalytic functional material capable of carrying a metal oxide in a simple method, having photocatalytic activity on a surface of activated carbon having adsorptivity, with superior adhesiveness with a substrate surface, and expressing continuous deodorizing action or decomposition action to noxious gas components over a long period.

A solvent containing at least particles of a metal, metal ions or a metal hydroxide is brought into contact with activated carbon fiber. By this, the particles of the metal, metal ions or metal hydroxide are adsorbed on the surface of the activated carbon fiber. Actually, zinc, zinc ions, zinc hydroxide can be used as the metal, metal ions and metal hydroxide. Then, the active carbon having adsorbed the particles of the metal, metal ions and metal hydroxide is subjected to heat treatment. The heat treatment forms the metal oxide, e.g., zinc oxide, having the photocatalytic function in the active carbon. The heat treating temperature is preferably 40-480°C.

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