A series of TiO2 thin film electrodes were prepared by a sol-gel method, an anodization method and a thermal oxidation method. The photoelectrochemical properties of these electrodes such as photocurrents and photopotentials were characterized under white light and visible light illumination. Visible-light photoelectrochemical responses were observed for all the TiO2 thin film electrodes prepared by the three methods without any modification. This may be due to many surface states with visible light absorption ability, which was caused by lattice distortion during the annealing treatment. The changes of the visible-light photoelectrochemical response of TiO2 electrodes prepared under different conditions were the same as that of the white light response.