The anthelmintic property of fresh aqueous+ acetone extract of Pongamia pinnata L. belonging to family Fabaceae was studied for anthelmintic activity against Pheretima Posthuma (Indian earthworm). Four concentrations (25, 50, 75 and 100 mg/ml)of leaves extract were studied in a bioassay, which involve the determination of time of paralysis and time of death of the worms. 100 mg/ml conc. of aqueous + acetone extract of leaves of Pongamia pinnata L. reveal considerable anthelmintic activity as compared to other three conc. and Albendazole (10mg/ml).Albendazole and saline water were including in the assay as standard reference drug and control respectively.