In this work, we investigate the optical properties of CuO-ZnO thin films formed on quartz substrate. CuO-ZnO nanocomposite films were obtained by solid-phase pyrolysis with different atomic Cu:Zn ratios (1:99, 3:97, 5:95, 10:90)  and annealed at a temperature of 600 °C. The crystal structure of the films was studied, and their optical transmission spectra were analyzed. It was found that transmittance is more than 84% for all materials in the range from 400 to 1000 nm.