Pulmonary aspergilloma (mycetoma) usually is a saprophytic fungal infection due to aspergillus species which is colonized and grows into pre-existing cystic/ cavitary lesions resulting from pulmonary tuberculosis or fibrotic sarcoidosis, or other fibro-cavitary diseases including interstitial lung diseases. Idiopathic pulmonary fibrosis (IPF) is a rare, chronic, progressive fibrotic lung disease, characterized by the histological pattern of usual interstitial pneumonia. Heavy smoker, diabetic, a 69-year-old male patient was admitted to our clinic with complaints of dry cough, fever, dyspnea on exertion and weight loss. The diagnosis was made as coexisting of pulmonary aspergilloma and IPF according to findings on HRCT. Hereby, we wanted to present this rare case regarding of coexisting of the development of Aspergillus infection and idiopathic pulmonary fibrosis in the light of the literature.