We present a technique for hazard index assessment that is used to prepare the landslide prediction map of the Hashtjin area (northwestern region of Iran) at a 1:50000 scale. The proposed technique makes it possible to determine the degree of landslide hazard and assess the landslide risks. It is established that landslides occur most often on slopes composed of alternating waterproof and water-bearing rocks. The displacement of large masses of soils or rocks on a slope is most often caused by wetting the soils by rain water. As the soils are filled with water and become heavy and more mobile, they slide over the slopes. Although the action of gravity is the primary driving force for a landslide to occur, there are other contributing factors affecting the original slope stability, namely, an increase in the steepness of the slope due to washing away the soil; the weakening of strength of rocks due to weathering, precipitations and groundwater; the influence of seismic shocks; construction and economic activity. The volume of landslide damage depends on the reason which gave rise to the landslide; in some cases it can affect large areas. Landslide hazard analysis makes it possible to establish the location of potential inclined slopes and to estimate the volume of the landslide, its frequency and distance traveled. To assess the landslide hazards, necessary data are processed by a GIS. A GIS offers a superior method for landslide analysis as it allows one to generate landslide maps and maps of likely occurrences of future landslides.