Human echinococcosis is a zoonosis caused by Echinococcus Granulosis. It occurs in rural regions where sheep and goat farming is widespread like Algeria. It constitutes a real public health problem. The lung occupies the second location after liver. The managment of pulmonary hydatid cyst is essentially surgical. In giant and large pulmonary hydatid cysts, pulmonary resection is the usual method of surgical treatment. We report a case of a patient presenting with a giant hydatid cyst of the lung and treated surgically by Hugon technique which is a conservative technique and consists of enucleation of the cyst.