To obtain a photocatalytic film which enables restricting of drop in decomposition efficiency of a photocatalysis by an adsorbent by forming a lower catalytic layer comprising a photocatalyst, the adsorbent and a binder on the surface of a base material and an upper catalytic layer comprising the photocatalyst and the binder on the surface of the lower catalytic layer.

In a photocatalytic film formed on the surface of a base material C, it is made up of a lower catalytic layer A as a mixture of a binder 1 and an adsorbent 2 and a photocatalyst 3 comprising titanium oxide and an upper catalytic layer B comprising the binder 1 and the photocatalyst 3. The binder 1 herein used is a silica based product for higher adhesion to the photocatalyst 3 and the photocatalyst 3, titanium oxide the most stable among various types now available. Moreover, the adsorbent 2 employs synthetic zeolite to raise the temperature for the formation (baking) of this film up to 500°C. A filter also nay be mixed as film reinforcing material as required.