This is a report of 23-year-old male with multiple sclerosing osteogenic sarcoma found during hospitalization after trauma. The multiple osteogenic sarcoma involved most of xial skeletal bones including skull, cervical vertebrae, seapula, sternum, lumbar vertebrae, pelvic bone and sacrum as well as soft tissue. Careful history taking, physical examinaton, radiological examination and morbid histological study disclosed that the tumor appeared to be a primary multiple osteogenic sarcma developed simultaneously at multipe foci than metastatic ones.