Objectives : The weight reduction program with very low calorie diet(VLCD) for women generally reduce bone mineral density(BMD). So many treatments were done to prevent side effect of the weight reduction program and herbal diet meditation were often used in oriental medicine. This research were done in order to study the effect of VLCD and herbal diet meditation, Chegamuiyiintang on BMD. Methods : This clinical research carried out 22 cases of pre-menopausal outpatients with obesity during 1 month. To evaluate the effect Chegamuiyiin-tang with VLCD on BMD, the weight, BMI, percent body fat, WHR, BMD(T-score) were estimated in pretreatment and post-treatment. Results : The mean weight reduction afetr 1 month was 6.87±1.54 Kg(10.28 % of initial weight), BMI reduction was 2.35±0.65 Kg/m2, percent body fat reduction was 3.40±1.01%, WHR reduction was 0.04±0.01. But BMD(in T-score) had significant increase. Conclusions : Generally VLCD were estimated to reduces BMD, but VLCD with herbal diet meditation, Chegamuiyiin-tanghas positive effect on BMD in pre-menopausal women during short term(1 month).