Million tons of waste materials are produced annually in India and their disposal has become a major environmental concern. The copper slag is a byproduct of copper ore during matte smelting and converting. Various techniques are available like soil stabilization, providing reinforcement etc. to improve load bearing capacity of soil. Soil stabilization is one of the modification techniques used to improve the geotechnical properties of soil and has become the major practice in construction engineering which enables the effective utilization of industrial wastes as a stabilizer. This paper investigates the improvement in the properties of clayey soil stabilized with copper slag. The results shown that, the strength properties of both soils improved with increase in percentages of copper slag. In this way industrial waste can be reduced economically.