It evaluated anti diabetic activity of ethanol extract of Bauhinia Purpurea linn plant parts, viz stem, root, leaf and flowers in wistar rats. Diabetes Mellitus was induced in rat by single intraperitoneal injection of streptozotocin (STZ, 50 mg/kg body weight). After STZ induction, the hyperglycemic rats were treated with all three extracts orally at the dose 200 mg/kg body weight daily for 15 days. Gliven clamide (0.5 mg/kg body weight p.o.) was used as reference drug. The fasting blood glucose levels were measured on every 5th day during the 15 day treatment. All the extract at 100, 200, 400 mg/kg orally significantly (p