This study was to find out how the model related between the participation motivation, exercise addiction and the level of participation in the exercise participants. The subjects on this study were aged between 18-60 participating presently in fitness center. The test of this study was analyzed by the structural equation modelling. In order to increase the level of reliability for the research model, the proved result through corrected model was found as a high suitability. The participation motivation in the exercise had an significantly effect on directly the psychological exercise addiction, and the psychological exercise addiction had an significantly effect on the level of participation. And the participation motivation in the exercise had directly an low effect on the level of participation. The participation motivation in the exercise having directly an influence on the psychological exercise addiction was very significant effect. And the psychological exercise addiction having directly an influence on the level of participation was very significant effect.