The purpose of this study is to evaluate to dynamic response of the isolation structure. The factors of performance effected on the isolation structure are design period and damping ratio. The variables that are the analysis were design period and damping ratio. Using a given variables, non-linear dynamic response analysis was performed by SDOF. The results of period, maximum response displacement and acceleration were analyzed. When the design period was moer than 3.0 sec, the isolation device has effective behavior.