Six hydatid cysts cases without a primary source anywhere were presented. Hydatid cyst is a parasitic disease well known for years are commonly located in liver and lungs. Those intradiaphragmatic and intramyocardiac were diagnosed preoperatively but those lying subcutaneously on sternum and the right first rib were recognized after operation. They were also confirmed with pathologic study. Patients were also detected for hydatid cysts elsewhere. As an endemic disease in our country, atypical locations should be kept in mind. This disease is to be remembered in considering soft tissue tumors.