The purpose of study was to compare the effect of balance performance in the elderly by the strengthening exercise. Thirty-one health elderly women aged 60 to 79 years participated in this study. Participants were divided into exercise(21) and control group(10). Exercise participants received strengthening exercise for 45 minutes in three times a week for 6 weeks while control subjects continued their normal activities. Exercise included resisted hip flexion, extension, abduction and adduction, knee flexion and extension, ankle dorsiflexion and plantarflexion. All subjects were assessmented clinical test of sensory interaction and balance, one leg stance test, Berg balance test. Exercise and control subjects were tested before, midway through, and at the end of the trial. These collected data were analyzed by using oneway and repeated ANOVA, scheffe`s test, t-test and correlation. The results of this study were as follows. 1. There were statistically significant difference in balance performance clinical test of sensory interaction and balance(p$lt;.01), one leg stance test(p$lt;.05), Berg balance test(p$lt;.05) by the strengthening exercise. 2. There was correlation between static balance and dynamic balance(p$lt;.01). 3. There was correlation between static balance and weight(p$lt;.05), dynamic balance and height(p$lt;.01), and weight(p$lt;.01).