In Korea, all the photoelastic materials are imported from foreign countries. The cost of these materials are expensive and problems in importing have been restrained research and development in this field. To reduce these problems, the domestic EPOXY RESIN which is made of bisphenol type epoxy resin have been investigated in this study to find to find a photoelastic characterics by tensile test and to measure photoelastic sensitivity coefficient and transition temperature and the optimum using condition was also investigated.