Experimental studies were conducted to investigate the hemostatic effect of the water extracts of Kwibitang. For this purpose, the effects of the extracts on the bleeding time in mouse tail and prothrombin time in vitro were estimated. Furthermore, its activity on the isolated uterine muscle in rats were investigated. The results obtained were as following; The bleeding time was not shortened, but the plasma prothrombin time in vitro test was significantly shortened. The uterotonic action produced by the extract was not inhibited by pretreatment of diltiazem at the doses of $10^{-5}g/ml$.