Purpose : This study was done to identify the relationship between physical exercise and quality of life in middle-aged adults. Method : The subjects of this study consisted of 251 mid-aged adults who lived in D city and N city. The instrument for this study was exercise performance scale by Kim and QOL scal by Ro. Data were collected form February 20 to March 20. 2003. Result : 1, Among participants, ″goom″ exercise performance consisted 39.2％ and exercise involvement was 41％. 2. The qualty of life showed positive significant correlation with the exercise performance(r=.21, p=.00). 3. Exercise performance was a predictor of quality of life and 8.3％ of the variance explained with exercise performance. Conclusion : The results of this study suggest that further development and applying of exercise performance programs are recommended for quality of life of mid-aged adults. In addition, further research needs to be done to identify relationship with these factors for various age group.