Pulmonary papillary adenoma is an extremely rare tumor and considered benign although its malignant potential is not completely understood. It is usually detected incidentally as peripheral lesions in chest radiography. A round mass lesion with regular margins was observed on the right side of our patient's chest radiography. The mass was enucleated and capitonnage was performed via right thoracotomy. Pathological examination was reported as papillary adenoma. Twenty three cases have been reported in the literature. While the largest diameter of lesions had been 3 cm in reported cases, the diameter of our patient's lesion was 4 cm. We present our postoperatively diagnosed papillary adenoma case due to its rarity and central location.