A gradient-index film composed of three coatings of TiO2/TiO2-SiO2/SiO2 was prepared on an FDS-90 glass substrate by the sol-gel process. The film showed low reflectivity in the visible and near-infrared wavelength regions. This low reflectivity is attributed to the gradient-index structure of the film, and not to the film microstructure or pores on the surface of the film.