A case of cellular schwannoma of the lung in 31 years-old Japanese male is presented in this paper. Cellular schwannoma differs from classic schwannoma in several histologic features. In addition, it has often been misdiagnosed as malignancy, though White's follow-up study confirmed its benign nature. It usually originates from the retroperitoneum and posterior mediastinum. No case originating from the lung has been reported in the world literature. Cellular schwannoma has to be added to differential diagnosis of the lung tumors.