Concentrations of cadmium in blood serum of samples of 84 (30 male + 54 female) healthy people living in Belsin-Kayseri, near the great industrial zone of Kayseri named Organize Sanayi Bolgesi, were determined by Graphite Furnace Atomic Absorption Spectrometry. The mean concentration of Cd was found to be 5.98+/-0.66 mu g/l. The serum cadmium concentration of persons living in this region are approximately three times higher than the world values