Authors reviewed 21 cases of histologically confirmed rib tumor except metastasis and myeloma from November 1973 to December 1982 at Seoul National University Hospital. The results are as follows : 1. Major clinical findings are pain and mass. 2. Pathologic diagnosis of rib tumors are 5 cases of fibrous dysplasia, 3 chondroma, 2 osteochondroma, 2 desmoplastic fibroma, 3 chondroma, 2 osteochondroma, 2 desmoplastic fibroma, 5 osteosarcoma, 1 aneurysmal bone cyst, 1 eosinophilic granuloma, 1 cavernous hemangioma, 1 chondrosarcoma. 3. Radiologic findings are osteolytic change with marginal sclerosis and no cortical destruction in desmoplastic fibroma, cortical destruction, soft tissue mass and pleural effusion in malignant tumors.