This case report is a chronic calcified pleural empyema in a patient who suffered a closed chest trauma 30 years ago. The first goal is to demonstrate how the closed chest trauma caused a bronchopleural fistula of the calcified pleural empyema, since the patient began to report continued purulent sputum after his trauma with weight loss and the appearance of an air-fluid level in the chest CT scan (no pleurocutaneous fistula in the clinical examination). The second goal is to reveal the rule and the interest of an open window thoracostomy in the management of chronic calcified pleural empyema, since a decortication remains difficult to perform in cases like this one.