Recently, there has been intensive in vitro and in vivo research on echinococcosis. In this study, two different experimental methods using mice have beer compared. Thirty-three BALB/c mice were used in the study. Nine of them were set aside as control group. A cyst in a bovine liver was opened under sterile conditions. Daughter cysts with a diameter of 0, 5-1 cm were removed from the large cyst and washed with sterile physiological saline. Two of these cysts were put into the peritoneal cavity of each of 12 mice (Group A). Another 12 mice (Group B) were injected intraperitoneally with 0.1 ml of a solution of protoscolices that had been washed with physiological saline. The abdomens of 3 mice from Group A were opened after three weeks and daughter cysts were found fixed to the walls of the abdomen. Three months later, all the mice from all groups were sacrificed and the cyst sizes were compared. In Group A, the cysts which had been placed in the peritoneum had reached a diameter of 1.5-2 cm diameter and were unilocular. In Group B, the largest intraabdominal cyst was 3 mm in diameter. Thus, putting daughter cysts in the peritoneum was considered to be a practical method for the production of experimental echinococcosis. In addition, this method not only makes it possible to study unilocular cysts, but it is also more rapid.