Optimum conditions for preparing PbTiO3 films on Si and SrTiO3 substrates are investigated in the dual-beam vacuum evaporation method using PbO and TiO2. It has been found that tetragonal PbTiO3 films are formed on Si substrates at temperatures ranging from 550-degrees-C to 600-degrees-C, and that the stoichiometric composition of the films is easily obtained at 600-degrees-C by supplying excess PbO molecules to the substrate. It has also been found that PbTiO3 films grow epitaxially on SrTiO3 substrates at temperatures around 550-degrees-C.