Purpose: The purpose of this study was to examine the safety knowledge and the level of safety behavior of elementary school children and to investigate the relativeness between them. Methods: The subjects of this study were 909 elementary school children in Seoul, Incheon, and Gyeonggi Province. The collected data were analyzed by frequency, percentile, one-way ANOVA, t-test, and Scheffe test using SPSS/WIN 17.0 program. Results: The results were as follows. First, the average of safety knowledge level was comparatively low which was 5.7 out of 10, and there were significant differences by gender and grade level. Second, the average of safety behavior was very low which was 9.5 out of 20, and the significant differences in gender and grade level were found. Third, a positive correlation existed between the safety knowledge and safety behavior, but the statistically significant relationship between them was not found. Conclusion: Safety education for children should be designed with purposeful and empirical-practical programs which help children actively cope with dangerous situations.