Case 1:A 62-year-old man underwent right S9+10 segmentectomy for non-small cell lung cancer. Three years later, pleural thickening appeared in the apex, and gradually developed cystic change. Case 2:A 64-year-old man underwent left upper lobectomy for non-small cell lung cancer. One year after surgery, chest computed tomography (CT) showed cysts in the apex of the lower lobe. The cysts expanded slowly with consolidation. Both cases were diagnosed as chronic progressive pulmonary aspergillosis. Although anti-fungal drugs were administered in both cases, case 1 died of the disease. Chronic progressive pulmonary aspergillosis is a rare late postoperative complication;when CT shows progressive cysts with consolidation in the apex area of the residual lung, frequent check-ups are needed.