Hydatid cyst disease (HCD) is a parasitic infection caused by Echinococcus granulosus larvae. Habitat of the disease is most frequently liver, followed by lungs; intracardiac occurrence is rare. When it occurs, cardiac involvement is more common in left ventricle, where blood supply is intense. Disease is extremely rare in right atrium. While following case at clinic with diagnosis of bilateral pulmonary hydatid cyst, right atrium involvement was incidentally found. Since hydatid cyst disease with intracardiac localization is rarely seen, present report was prepared in order to draw attention to importance of thorough diagnosis and treatment of these patients.