Purpose: A dance exercise program was performed to investigate the effects of exercise on exercise intention and exercise-related affect as these are important determinants of exercise behavior. Method: The subjects were overweight (23$leq$BMI<25) or obese (BMI$geq$25) postmenopausal women (n=14), who participated in an exercise program from May, 2003 through November, 2003 at one public health center located in Kyong-gi Province. Data was analyzed with an SAS PC program. Result: Exercise intention was significantly increased after the exercise program (t=-2.24, P=0.04). Exercise-related affect was also increased, but there was no statistically significant change (t=1.81, P=0.09). Conclusion: This study suggests that exercise participation can increase the level of future exercise behavior by increasing exercise intention and exercise-related affect.