The aim of the present study is to investigate the antidiabetic effect of the aqueous extract of Momordica charantia seeds in alloxan - induced diabetic rats. Forty male albino Wistar rats were used, divided randomly into four groups (10 each). Oral administration of the seed extract at a dose of 150 mg/kg B.W. for 30 days showed a significant decrease in fasting blood glucose. Our results were greatly lower after oral administration of aqueous extract of Momordica charantia seeds in alloxan- induced diabetic groups than glibenclamide treated group. Also Momordica charantia extract and glibenclamide administered rats showed progressive increase in body weight