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This study was conducted to verify the effect of two training methods on the first responder police officers' quality of CPR skills by measuring the accuracy of CPR performance.The subjects were consisted of 50 police officers. Subjects were divided into two groups; 25 in hands-only CPR training group and 25 in traditional CPR training group. For homogeneity, before assigning to two groups, accuracy of CPR skills was measured. And then participants was assigned two groups based on scores. The collected data were analyzed using the SPSS/WIN 22.0 program. The significance level was p<.05. After two CPR training methods, hands-only CPR training and traditional CPR training, quality of CPR technique was good in both groups. There was no significant difference in accuracy in most cases. In detail, scores of chest compression rate, chest compression rate accuracy, chest compression depth, chest compression depth accuracy, chest relaxation rate accuracy and chest compression position were better than those of before training. The score of compression rate was slightly higher in hands-only CPR training group, but scores of both groups are in the standard. So it didnt have any meaning. As a result, both hands-only CPR training and traditional CPR training were efficient training methods. After training, it was confirmed that the CPR skills were improved. Therefore to perform proper CPR skills, the first responder police officers should take CPR training whether hands-only CPR or traditional CPR. After CPR training, the CPR skills of police officers were improved. To find a more efficient training method, it is need to evaluate CPR quality at 6 months after training.