Purpose: This study was conducted in order to identify factors related to the health behavior in elementary school children at a late school age and to provide basic data to develop more concrete and practical applications for health promotion and disease prevention. Methods: The participants were 2,775 4th, 5th and 6th graders sampled from 10 elementary schools in Busan Metropolitan City and data were collected from 15th May to 30th June, 2010. The collected data were analyzed by mean, percentile, t-test, ANOVA, Pearson s correlation coefficient, and stepwise multiple regression using the SPSS/WIN 17.0 program. Results: The average percentiles for self-rated health, body satisfaction, stress, parent attachment, self-esteem, and health behavior were 82.8, 69.5, 40.9 79.3, 75.9 and 75.9, respectively. There was significant relationship among the levels of self-rated health, body satisfaction, stress, parent attachment, self-esteem, and health behavior. Body satisfaction was the most powerful factor to the health behavior of elementary school children at a late school age, and was followed by parent attachment, self-rated health, self-esteem, and grade in order. These variables explained 26.6% of the total variance in health behavior. Conclusion: Health promotion behavior programs including body satisfaction and self-esteem elevation programs should be applied to children at home and in school and community. To achieve this, institutional and economic support should be continued.