A total of 188 cases of primary bone tumor was reviewed and analyzed clinically and pathologically at the Department of Orthopaedic Surgery, Presbyterian Medical Center, Jeonju, Korea during the 10 years period from January, 1970 to December, 1979. The results were obtained as follows: 1. 58 cases were benign and 130 cases were malignant. 2. Osteochondroma was the most common benign bone tumor and followed by giant cell tumor, simple bone cyst, osteoma and fibrous dysplasia. 3. Giant cell tumor was 15 cases, which were divided pathologically into benign(Grade I & II) 8 cases and malignant (Grade III) 7 cases. and treated by curretage, curettage & bone graft, arthrodesis, irradiation and amputation. 4. The most common primary malignant bone tumor was osteosarcoma, and it was followed by chondrosarcoma, fibrosarcoma and multiple myeloma. 5. Osteosarcoma was 60 cases and it occured commoly around knee joint area. 6. Treatment of primary malignant bone tumor contained of amputation, chemotherapy and irradiation.