CdSe thin films have been deposited on glass substrate in aqueous solution by spray pyrolysis technique at increasing substrate temperatures. The effect of substrate temperature on structural properties has been investigated. The structural, optical and electrical properties of deposited films were studied using, X-ray diffraction (XRD), UV-VIS spectrometry. The XRD diffraction spectra show that the films are of hexagonal in structure. The thickness of film, grain size of constituents and optical properties are also reported.