To provide a photocatalyst coating in which a photocatalyst reaction is quickly and strongly caused to degrade pollutants in the environment.

The photocatalyst coating contains titanium oxide, silicon oxide and silicon oxide as the main components of a trielement curing agent, and is cured at ordinary temperature. Since the photocatalyst coating responds to ultraviolet light and visible light to accelerate electrons, a time until exciting the electrons is shortened. When the electrons of the photocatalyst are excited in a short time, the deterioration of electric charge separation can be minimized even under a condition that a large quantity of ultraviolet light is irradiated. Since the copper oxide is compounded, the efficiency of the charge separation is improved, and the recombination of electron holes with electrons produced in the photocatalyst titanium oxide can be prevented to prevent the deterioration of the reaction efficiency. The organic substance-degrading function of the photocatalyst coating is largely improved in comparison with conventional photocatalyst coatings due to these composite factors.