Pericardial hydatid cystis a rare condition; its clinical presentation is variable. It can reveal straightaway at the stage of life threatening complications. We report the case of a 17 years old female Arab patient, who complained of a sudden onset dyspnea, clinical examination was poor; the diagnosis was suspected by echocardiography and confirmed by the CT scan and hydatid serology. Furthermore, no other location was noted. Surgical treatmentwas proposed. The modern cross-sectional imaging especially CT scan and MRI revolutionized the diagnosis of this rare hydatid location.