Background: Osteoporosis is a silent disease, especially in the premenopausal women, that may lead to many complications. Health belief model may be a beneficial method for increasing the knowledge, reinforce attitude and behavioural change towards osteoporosis. Objective: To assess the impact of educational intervention on the awareness and perception of osteoporosis risk in obese women with vitamin D deficiency in child-bearing period. Method: This is an interventional study conducted on women attending Zagazig university hospitals' outpatient clinics during the period from 2019 to 2022. Eighty obese women with vitamin D deficiency were randomly allocated into intervention or control groups. Health education program was implemented, and we used Osteoporosis Health Belief Scale (OHBS) and osteoporosis self-efficacy for assessment. Results: Intervention and control groups were not different as regards age (33.3±7.77 versus 34.95±9.06) or other demographic characteristics. Pre-intervention, OHBM and osteoporosis self-efficacy scale were not significantly different between the studied groups. Post-intervention, intervention group had significantly higher OHBM scores compared with control group, both subscales and total (102.9±3.95 versus 83.03±7.8). Post-intervention, intervention group had significantly higher self-efficacy scale (improvement); with a median (interquartile range) 71.25 (60.63 -76.88) in intervention group versus only 7.5 (5-15) in control group. Post-intervention, OHBM and the osteoporosis self-efficacy scales were significantly improved in the health education group. Conclusion: Health education raised obese women's knowledge about beneficial practices against vitamin D deficiency such as sun exposure, exercise and calcium intake and improved their confidence in avoiding osteoporosis. Key Words: Osteoporosis, health belief model, Obesity