With the rapid development in technology, the radiation protection has become one of the most important part of building construction. As shielding is the basic method for radiation protection, besides the physical and mechanical properties of materials used in building construction, the radiation shielding properties should also be known. In this study, the linear attenuation coefficients of two different types of Golcuk-Isparta pumice which is an alternative building material have been measured and the results were compared with the calculation and some other materials. Key words: Pumice, g-ray shielding, attenuation coefficients.