Thymolipoma is a rare benign tumor of mediastinum. It comprises 2-9% of all thymic neoplasms. A 35-year-old man patient applied to our hospital with chest pain. In physical examination nothing characteristic was found and the routine laboratory findings were not remarkable. A chest radiograph showed no abnormalities however chest multislice computed tomography scans revealed an anterior mediastinal lesion in thymic area. No findings was found in respect of invasion in magnetic resonance imaging. Preoperatively radiological diagnosis was thymic hyperplasia but histopathological diagnosis was thymolipoma. We present the case of thymolipoma phenomenon which causes the chest pain.