The objective of present work was to evaluate the anthelmintic activity of petroleum ether and aqueous extract of stem bark of Bauhinia purpureaL. using Indian earthworms Pheretimaposthuma as test worm. Various concentrations of petroleum ether extracts were tested in the bioassay, which involved determination of paralysis time and death time of the worm. Piperazine citrate (30mg/ml) was used as a reference standard. The result of present study indicates that the petroleum ether extract significantly demonstrated paralysis, and also death of worms.