Localized fibrous tumor of the pleura is very rare. Most of them are benign, but some are malignant. This clause does not relate with the rest of the sentence. The single best predictor of clinical benignity is whether the tumor can be totally resected. We experienced a case of localized fibrous tumor of the pleura in a 57 year old man with right chest pain and cough. He was informed of a $8{ imes}5cm$ mass in his right lower lung field, which was benign 3 years ago. Preoperative chest x-ray showed an increased hazy density at right lower lung field, and CT scan showed a $12{ imes}8cm$ huge mass, which was located in right lower thorax. Left thoracotomy was done to excise a $12{ imes}8{ imes}5cm$(1200gm) sized large mass delete. The patient was discharged without any complications postoperatively.