Authors reviewed 264 cases of meconium aspiration pneumonia of the newborn at Sohwa Children's Hospital from July 1981 to June 1984. The radiologic findings were retrospectively analysed with particular attention to the degree of pulmonic infiltrations. The results were as follow: 1. The male to female ratio was 1.8:1 and clinical conditions which commonly associated were postterm infants (41.3%), placental dysfunction syndrome (33%) and perinatal asphyxia (11.4%). 2. There were improved (76.9%) and expired cases (12.1 %) as clinical course. 3. Radiologic findings were noticed .as pulmonic infiltration (68.2%), hyperinflation (35.2%), pneumomodiastinum (18.6%), pleural effusion (14.4%), pneumothorax (13.3%) and suggestive interstitial emphysema (6.8%). The more the degree of pulmonic infi ltration was been severe, the more the incidence of other pulmonic lesions was increased. 4. Pulmonic infiltrations were commonly occured in both lungs but pneumothorax, pleural effusion and hyperinflation in right. 5. Radiologic findings of 32 expired cases were noticed as pulmonic infiltrations (93.8%), hyperinflation (53.1 %), pneumomediastinum (37.5%), pneumothorax (18.8%), suggestive interstitial emphysema (18.8%) and pleural effusion (18.8%).