Hydatid disease caused by echinococcus granulosus is still a serious problem in both underdeveloped and developing countries. Clinical signs of the disease are not specific. Most patients have no symptom or sign when a hydatid cyst is discovered. Symptoms depend on its complications, location and size. Parasite can settle in every organ and tissue in the human body. We report two cases with diaphragmatic hydatid disease with no other cyst present.