The knowledge level and educational experience of high school students on CPR, which can contribute to saving more lives and increasing the survival rate of cardiac arrest patients by applying CPR when students face cardiac arrest patients, was grasped. This study was attempted to provide basic data for policy establishment that includes the contents of CPR in the high school curriculum in the future.
 Convenience sampling was conducted on 129 female high school students attending Y girls' high school located in G region and C city, and the survey was conducted from November 1 to November 30, 2021. A structured questionnaire consisting of 3 questions for general characteristics, 1 question for subjective awareness of CPR knowledge, 8 questions related to CPR knowledge, and 16 questions related to grasping CPR educational experience was used. Descriptive statistics, t-test, and ANOVA analysis were applied to the final 120 responses using SPSS WIN 25.0.
 The female high school students scored an average of 5.57 points out of 8 points, and their knowledge of basic life support was moderate. Looking at the results of knowledge about CPR by item, the minimum correct answer rate was higher than 60.0% for 7 out of 8 items, but the breathing check method was the lowest at 9.2%. 96.7% of the students received training on CPR. As for the place where they were educated, school was 95.7%, student group activities (clubs) 7.8%, and fire station 3.4%. The total number of times of training was 3 times or more, 47.4%, 1 time, 34.5%, and the total training time was 3 hours or more, 48.2%. If education is opened in the future, schools (46.7%), Korea Cardiopulmonary Resuscitation Association (27.5%), and fire stations (13.3%) were the preferred educational institutions. The difference in CPR knowledge according to the subject's grade, religion, and the presence or absence of heart disease among family or friends was not statistically significant.
 When integrating the results of this study and previous studies, it was confirmed that the students' ability to use CPR and the use of an automatic defibrillator was at a low level, although CPR education was being conducted in schools due to the revision of the School Health Act in 2014, and countermeasures are needed. In particular, it is necessary to prepare improvement methods such as strengthening practical education. It is necessary to clarify first aid education regulations such as CPR for students, expand CPR practice including AED practice, expand supply of AED and CPR manikin for practice, and strengthen education capacity of health teachers. And continuous repetitive education should be conducted according to the CPR guidelines that are revised every 5 years.
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