Thin film of CdS has been deposited on ultra-clean glass substrates by screen-printing method followed by sintering process. AR grade cadmium acetate  and sodium sulfide have been used as the basic source material. Optimum conditions for preparing good quality screen-printed films have been found. X-ray diffraction studies revealed that the films are polycrystalline in nature, exhibiting wurtzite (hexagonal) structure with strong preferential orientation of grains along the (1 0 1) direction and average size of the particle is found to be 19.39 nm. The optical band gap of the films has been studied using reflection spectra in wavelength range 300-800 nm by using JASCO V-630 UV-VIS spectrophotometer and it comes to be 2.34 eV. This is suggestive of the fact that cadmium sulphide is a wide band gap semiconducting material. X-ray diffraction also confirms the formation of CdS composition. The electrical studies revealed the semiconducting nature of CdS alloy with the dark conductivity of CdS film comes out of the order of 10¬⁻³ Ω⁻¹cm⁻¹ and value of activation energy comes out about 0.13 eV.