Hydatid disease is a zoonotic parasitic disease caused by Echinococcus granuloses. The most common site is the liver, followed by the lung. Pleural involvement is rare; it could be primary or secondary. Imaging plays an important role in the diagnosis. We present the case of a 9-year-old patient who was previously operated on for a left lung hydatid cyst 4 years ago. She consults in the emergency room for a cough, chest pain, and expectoration, all evolving in the context of apyrexia. Her chest x-ray revealed multiple round opacities of the left pulmonary field. A CT scan showed several pleural cystic lesions, some of which contained septa and others embedded at the cost diaphragmatic recess, pushing down the diaphragm and exerting a mass effect on the spleen. No pulmonary involvement was noted. The diagnosis of pleural hydatid cysts was suspected on imaging and confirmed later by surgery and histological analysis.