Langmuir-Blodgett films were obtained on the basis of octadecylamine monolayers containing nanoparticles of various metals hexacyanoferrates. Nanoparticles were prepared using sodium hexametaphosphate as a stabilizer, their average sizes were determined by laser diffraction method. The effect of a stabilizer on the size and shape of hexacyanoferrates particles was shown by scanning electron microscopy, and the morphology of octadecylamine monolayers containing the obtained nanoparticles was studied.