In our previous experiments, Bi2O3 photocatalyst prepared using urea showed hydrogen generation activity under ultraviolet irradiation, although it did not show the activity under visible light irradiation. Therefore, in this study, inexpensive iron oxide as a transition metal oxide was added to bismuth oxide in order to obtain response to visible light, Fe2O3-Bi2O3 catalyst was prepared by the sol-gel method, and the effect of Pt loading was investigated. Pt/Fe2O3-Bi2O3 with appropriate amounts of platinum and Fe2O3 showed high photocatalytic activities under both ultraviolet and visible light irradiation.