PURPOSE: The purpose of this study was to provide fundamental materials for improving school health promotion programs by investigating school nurses' awareness of the importance, performance level, and perceived competence level of school health promotion programs in Gangwon-do. METHODS: The subjects of this study were 173 school nurses who were working in Gangwon-do. The instrument for this study was a scale for awareness of importance, performance level, and perceived competence level. Data were collected on December 15, 2007 and analyzed using SPSS 13.0 for Windows. RESULTS: The mean score of awareness of importance was 3.51 (range: 1~4). The mean score of performance level and the mean score of perceived competence level were 3.35 (range: 1~4) and 3.29 (range: 1~4), respectively. The younger school nurses were (F=4.380, p=.014), the higher their awareness of importance was. The performance level was lowest in high school nurses (F=5.013, p=.008). There were significant correlations between awareness of importance, performance level, and perceived competence level in school nurses. CONCLUSION: In order to improve the effectiveness of school health promotion programs, training and education programs for school nurses' competencies and technical support systems for school nurses should be provided.