Tamarind seed to bite 70% ethanol at 60 C for 24 hours. The extracts are brought out with solvent evaporation evaporator pressure reducer and the extracts were analyzed it was found that the3.14 times by can inhibit free radicals were 50 was 53.42 UG / ml. The study shows that the antioxidants in the shell tamarind seed have higher almost equal, grape seed extract.