OBJECTIVES: In the recent years, osteoporosis and fracture with osteoporosis is growing due to increasing of old people. In case of fracture with osteoporosis, there is much socio-economic loss adding to the disability of patients. Prevention of osteoporosis and Fracture is more economic and more effective than treatment after occuring fracture. Study of risk factor of increasing fracture is meaningful. And the investigation of these factors, contributed to fracture can be used as milestone for prevention of fracture. METHOD: Case-control study was done with the patients(191 case) who examined BMD (DEXA). Cases were divided into two group; one was fracture group(39 cases) and the other was non-fracture group(152 cases). Then weight, height, age, and BMD known asthe risk factors of the osteoporotic fractures were investigated and analyzed. RESULT: 1. Non-fracture group showed high score than fracture group in weight, height and BMI, but there were no statistical differences. 2. Age of fracture group was higher 10 years more than that of non-fracture group and there were significant statistical differences. 3. The extent of osteoporosis was inversly proportional to age, but proportional to weight and height. 4. There were significant differences between fracture and non-fracture group in BMD, and after correction of age & BMI, significantly different in L1 and L3 vertebrae. CONCLUSION: We suggest that BMD, age, weight, height and BMI have many influences on the fracture prevalence, the study for the effect of the various risk factorswill contribute to the prevention of the fracture.