The Propose of this study was to analyze the change of post exercise of acute treadmill exercise on blood pressure and vascular compliance in essential hypertension patients. Twenty volunteers were studied : hypertension group(10), normal group(10). The experimental group was practicing on a treadmill at 60%HRmax exercise intensity for 30 minutes. We measured blood pressure and vascular compliance on 30minuses pre-exercise, 0, 30, 60, 90, 120, 150, 180, 210, 240, 270, 300 minuses post-exercise. This data were analyzed by independent t-test and repeated measure ANOVA. The result was as follows: After 60% HRmax exercise, the systolic pressure of the hypertensive decreases up to 25mmHg. The maximum decrease of blood pressure occurs at 30 minutes after the exercise, and this decreasing effect is kept up for 5 hours. The vascular compliance of the right foot of the hypertensive shows the highest level at 60 minutes after the exercise and normal level up to 180 minutes. The increase of vascular compliance continues for 5 hours. The vascular compliance of the left foot of the hypertensive increases continuously by 150 minutes after the exercise and shows normal level up to 180 minutes. The increase of vascular compliance continues for 5 hours.