The purpose of this study was to examine the relationship among social support, health belief and health promotion behavior in leisure sport participants. The subjects of this study were collected from 000 leisure sport participants. The survey questionnaires were used to collect the data. And data were analyzed by exploratory factor analysis, confirmatory factor analysis, correlation analysis, reliability analysis and structure model analysis. The results were as follows: First, social support of leisure sport participants had not significant influence on health belief. Second, social support of leisure sport participants had positive influence on health promotion behavior. Third, health belief of leisure sport participants had not significant influence on health promotion behavior.