Solitary fibrous tumors are relatively frequent. They may occur throughout the body. About 20% of tumors develop in the thorax, out of which vast majority is localized on its wall. Within thorax, they usually originate from pleura, most frequently the visceral one. Authors present a 67- year old male in whom the tumor was diagnosed during the investigation for dyspnea. During operation, solitary, well circumscribed, firm, rubber-like tumour, 11x10x9 cm in diameter, covered with serosa, arising from the visceral pleura of the base of the right lung was easily excised. The classical histological and immunohistochemical examinations confirmed the diagnosis of benign fibrous tumor. Postoperative recovery was uneventful. Preoperative symptoms disappeared.