The effect of treatment with SrCl2(10 mg/100 g rat) on rats 15 minutes prior to whole body γ-irradiation (7,5 Gy) was studied. The hazardeous effect of irradiation were greatly corrected in the treated group. The hyperglycemic effect and liver glycogen accumulation in the untreated group decreased to normal level. The enzymatic activities of serum alkaline phosphatase, alanine aminotransferase, aspartate aminotransferase and lactate dehydrogencase were greatly affected showing insignificant changes in the treated group of animals. Life span calculated on 50% survival was also significantly elongated by 36.3%. These results show the potentiality of SrCl2as a radioprotective agent which was not used before.