The purpose of this study is to prepare high-quality TiO2 thin films suitable for dye-sensitized solar cells using electrophoresis method. A high-quality TiO2 thin film without crack could be deposited using highly dispersed colloidal solution of TiO2 fine particles. Highly dispersed colloidal solution was prepared using mechanical milling (MM). The two electrodes of electrophoresis were set parallel to liquid level. Optimum preparing condition to disperse TiO2 fine particles using MM could be found. Under this condition, homogeneous TiO2 thin film was deposited on ITO glass. The open-electromotive force and short-circuit current of dye-sensitized solar cell showed excellent reproducibility.