This study set out to identify the factors to affect the oral health promotion behavior of elementary school students and to provide a framework to develop educational programs to promote their oral health promotion behavior. A survey was conducted to 729 fifth and sixth graders attending four elementary schools in Seoul. The variables were measured with a five-point Likert scale and include previous oral health related behaviors, perceived oral health status, perceived benefit, perceived barriers, self-esteem, self-efficacy, and oral health promotion behavior. First, the subjects scored relatively high 3.51 points out of 5 in oral health promotion behavior. They also scored 3.88 points in perceived benefit, 3.51 in selfesteem, 3.43 in self-efficacy, 3.28 in perceived oral health status, 2.77 in previous oral health related behaviors, and 1.79 in perceived barriers. Second, a significant difference was observed according to gender in previous oral health related behaviors and oral health promotion behavior. And a significant difference was also found according to grade in previous oral health related behaviors, perceived benefit, perceived barriers, selfesteem, self-efficacy, and oral health promotion behavior. Third, when they had an experience of visiting a dental clinic for preventive purposes, a significant difference was found according to the purposes of going to a dentist in previous oral health related behaviors, perceived benefit, and oral health promotion behavior. And fourth, multiple regression analysis was carried out with oral health promotion behavior as a dependent variable. As a result, all the research variables, which include previous oral health related behaviors, perceived oral health status, perceived benefit, perceived barriers, self-esteem, and self-efficacy, turned out to have significant influences on oral health promotion behavior. And their explanatory power was 49%. Conclusion: Those factors that were identified to affect the oral health promotion behavior of programs to promote their oral health.