Mediastinal shift is common after pneumonectomy and herniation of the remaining lung into the opposite hemithorax has consequently been reported. In this case, we present the herniation of the pneumonectomy cavity contained by the calcified pleura through an intercostal space, in a patient who has undergone a left pneumonectomy 47 years previously. We repaired the intercostal muscular defect using a Mersuture mesh. The patient did well and there was no postoperative pain.