Bronchogenic cyst and pericardial diverticulum are relatively infrequent respectively, but they have been detected more commonly with the increasing popularity of the routine and mass survey examination of the chest. A 31 year-old male was admitted for the evaluation of productive cough and two mass lesions in left side on the chest films and bronchogram. Exploratory thoractomy revealed pericardial diverticulum and bronchogenic cyst, which were confirmed by pathologic examination. We are willing to report this combined case which was treated uneventfully by left lower lobectomy and diverticulectomy