The present study describes the case of an asymptomatic 65-year-old male who presented with a Solitary Fibrous Tumor (SFT) in the lung during a physical examination. Enhanced computed tomography revealed a 1.5x1.5-cm mass in the lung; however, further physical examinations were normal. The patient underwent surgery due to the uncertain diagnosis and the possibility that the mass was malignant. Histopathological analyses of the tumor demonstrated the typical histological characteristics of an SFT. Immunohistochemical staining for B-cell lymphoma-2 and cluster of differentiation 34 were positive. The patient recovered and was discharged successfully. At the six-month postsurgery follow-up, no recurrence or metastasis were observed.