Cystic fibrosis is the most frequent and lethal inherited disease, affecting populations of European and Caucasian origin. Pneumothorax is life threatening pulmonary complication of cystic fibrosis. Bilateral pneumothorax is rarely seen and is a predictor of poor prognosis. We report a newborn presenting with bilateral pneumothorax whose diagnosis was cystic fibrosis with N1303K mutation on CFTR gene.