In the field of materials science, the complex connection between the optical and electrical characteristics of metal chalcogenide materials has made their study attractive. In this paper, at room temperature sol gel technique was used to prepared zinc sulphide thin film using zinc acetate dihydrate, thiourea, absolute ethanol, triethanolamine. Zinc sulphide thin film was prepared manually. The crystal structure of ZnS was found using X-ray diffraction. The diffraction peaks of ZnS were located at 2θ- 28.56°, 33.08°, 47.40°, 56.34°, 69.44° which is compared to standard PDF card- 9000107. And due to this it has been found that zinc sulphide structure was cubic structure.