PURPOSE: The purpose of this study was to investigate bone mineral density(BMD) and identify risk factors of osteoporosis in Korean postmenopausal women. METHODS: The subjects consisted of 328 women. The BMD of the calcaneus were measured with peripheral dual energy x-ray absorptiometry. The risk factors were collected by a self-report standardized questionnaire. The differences among the osteoporosis, osteopenia, and normal group were compared by one way analysis of variance test, Scheffe's multiple comparison tests and Logistic regression. RESULTS: The average age was 65 years old and the average T-score was 28.7% with osteoporosis. The Risk factors of osteoporosis were inclined by 24% in age (OR = 1.24, CI = 1.16 ~ 1.31), 53% in menarchal age (OR = 1.53, CI = 1.24 ~ 1.88), 3.5 times in vegetarian (OR = 3.52, CI = 1.66 ~ 7.47), 2 times in small-bowel disease (OR = 2.01, CI= 1.03 ~ 3.94), 5.3 times in arthritis (OR = 5.33, CI = 1.61 ~ 17.67), 5.5 times in eating disorder (OR = 5.50, CI = 1.43 ~ 21.17), 6 times in health perception (OR = 6.08, CI = 2.30 ~ 16.06). The Risk factors of osteoporosis were reduced by 10% in weight (OR = 0.90. CI = 0.83 ~ 0.97), and 10% in menopausal age (OR = 0.90. CI = 0.84 ~ 0.98). CONCLUSION: The risk factors of osteoporosis were in the general characteristics, menstrual history, history of disease, life style & diet, and health perception. Eating disorder and health perception are highest on the risk factor of osteoporosis in Korean postmenopausal women.