Purpose: This study was to investigate family functioning, self-concept and health promotion behavior of elementary school students and to find out the correlation among these variables. Method: The subjects were 277 students who participated voluntarily in the questionnaire. The instrument used in this study was family APGAR, self-concept and health promotion behavior tool. The data were collected from May 18th to 21st, 2004 with a self-administered questionnaire, using frequency, percentage, t-test, ANOVA, Pearson correlation coefficient and stepwise multiple regression with SPSS 10.0 win. Results: 1) The mean score of health promotion behavior by general characteristics was significant in educational status of mother (F=5.352, p=0.005), living standard (F=9.646, p=0.000) and perceived health status (F=8.349, p=0.000). 2) The mean score of family functioning was 3.57 (5 point scale), self-concept was 3.47 (5 point scale) and health promotion behavior was 3.67 (5 point scale). 3) In the relationship between family functioning and self-concept was correlated (r=.547), family functioning and health promotion behavior was correlated (r=.518) and self-concept and health promotion behavior was correlated (r=.670). 4) The most influencing variable was self-concept, accounting for 43% in stepwise multiple regression. A combination of self-concept, family functioning and perceived health status explained 47% of the variance for health promoting behavior. Conclusion: Considering the results above, we can recognize that there are close relations among the family functioning, self-concept and health promotion behavior. Therefore, it is necessary to elevate the level of self-concept and family functioning in order to get health promotion behavior of the elementary school students.