This study aimed to evaluate the effectiveness of peer-support, selfmanagement program on the self-management behavior and blood pressure of older adults with essential hypertension. A randomized control trial was designed. Eighty-one older adults with hypertension were randomly assigned to two experimental groups and one control group of 27 older adults each. At the fourth and sixteenth week after completing a peer-support, self-management program, participants in the two experimental groups demonstrated statistically significant improvements in self-management behavior and reduced blood pressure that were also significantly different from those of the control group. peer-support, self-management program helped maintain self-management behaviors and reduce blood pressure in older adults with hypertension.