Elemental analysis of 40 glass samples from the Northern Tomb and the Southern Tomb of Hwangnam-daech'ong No. 98 was performed. Fourteen compositions of each sample were analyzed quantitatively by SEM-EDS and glass samples were classified by multivariate analysis as PCA. All of 40 samples were confirmed to be Na2O-CaO-SiO2 system with about 20% of Na2O. Samples were classified into two groups by doing PCA on concentrations of 5 major elements (SiO2, Al2O3, Na2O, CaO and K2O). Samples included in group I showed the concentration of Al2O3 is about 9.7% and that that of CaO, about 2.2%. In group II, concentration of Al2O3 is about 3.2% and that of CaO, about 4.9%. Especially yellow grains embedded in sample No. 12 were shown to be PbSnO3 by microXRD, which was the first coloring material ever found in Korea. Lead isotope ratios of samples No. 12 and No. 17 which contained lead were measured by TIMS. The origin of lead was traced by means of multivariate analysis such as SLDA. The result showed that lead from southern China and southern Korea had been used for making glass.