The hydatic disease is cosmopolitan and is due to the development of the larva of a small tapeworm called Echinococcus granulosus. Although rare, today, there are many cases of hydatic cyst of the heart. Echocardiography and other physical examinations reveal the fluid collection and also specify its exact location on the heart. Our study focused on patients undergoing surgery for hydatic cysts of the heart during the years 2008 and 2009 in Erriadh teaching hospital, where we have collected seven cases over this period. The young average age of patients, 18 years, favors a high incidence. The sex ratio is 0.14. All the heart walls and cavities were the site of hydatic development. In addition, serology for primitive cardiac hydatidosis provided very low levels of antibodies. The cystic echinococcosis remains a scourge. The cardiac localization remains a very severe disease. The management of patients is very complex. The hydatic cyst of the heart affects teenagers and young adults. It is the main cause for long-term, major complications. In patients from endemic areas and for any patient who developed hydatidosis, it is essential to conduct a systematic search for localization by cardiac echocardiography. This simple measure can manage patients more quickly and avoid complications with socioeconomic consequences.