A new method was developed for the preparation of Langmuir-Blodgett (LB) films of oxotitanium phthalocyanine (TiOPc)/copper tetrakis(hexyloxycarbonyl)phthalocyanine (C6CuPc) mixtures, based on the finding that almost insoluble TiOPc becomes soluble in chloroform upon mixing with C6CuPc. Surface pressure-area isotherms of the mixed phthalocyanines suggested that the two phthalocyanines are miscible in the monolayers. Visible absorption spectra and photoconductive properties of the mixed LB films were studied.