We report here five cases of Echinococcus Multilocularis infection. Of these five cases four were diagnosed by explorative laparotomy and one with ultrasonography - guided needle biopsy. Patients whose dieseases showed no improvement with mebendazole were given albendazole. Two of these patients died despite treatment while the other three are still alive and on albendazole treatment, under periodical controls. Because echinococcus multilocularis infection is an extremely rare disease and the diagnosis can generally be made at late stages of the disease, it should be kept in’ mind for the differential diagnosis of the hepatic masses. We believe that albendazole is an effective agent for the treatment of this disease.