Congenital cystic adenomatoid malformation (CCAM) of the lung is a rare anomaly of fetal development of terminal respiratory structures. We report three cases of congenital cystic adenomatoid malformation (CCAM) of lung Stocker's type I. All the cases presented with progressive neonatal respiratory distress. One case developed hyaline membrane because of ventilator therapy. No other congenital malformation was found in any of our cases. Two of our cases were suspected on antenatal ultrasonography. Routine prenatal ultrasonography has increased the frequency of prenatal diagnosis of congenital cystic lung malformation including CCAM. The pathogenesis, management and prognosis of CCAM are discussed along with a review of literature.