The purpose of this study was to effects of 12 week badminton exercise program participation on body composition indics and cardiorespiratory function in middle aged women.The subjectsofthisstudy weretotal2 persons(control group: 15, exercise group: 15). Subjects in 2 groups performed their assigned badminton exercise program 1h/day, 3day/week for 12weeks. In measurements indics, body composition factors were determined body weight, BMI, % body fat, and WHR. And cardiorespiratory function factors were determined VO2max, VEmax, RER, exercise time. Data obtained at pre and post test were compared among two groups test utilizing two-way ANOVA with repeated measures. The results of this present study were as follows: In body composition factors, body weight, BMI, % bodyfat, and WHR had significant decreased between pre and post 12weeks badminton exercise program in allgroups. In cardiorespiratory function factors, VO2max, and exercise timehad significantincreased between pre and post 12weeks badminton exercise program in all groups. It was concluded thatmiddleaged women were improved by badminton exercise program was more effective for enhancing daily living fitness, exercise performance and circulation control.