Background: The average duty hours of resident physicians will be restricted to below 80 hours/week in Korea. This study was intended to determine current status of duty hours of emergency resident physicians in Korea. Methods: The training committee of the Korean society of emergency medicine surveyed every year a questionnaire about resident training status to training hospital directors. The 2013 survey questionnaire contained the total number of duty hours during 4 weeks of July (first to 28th day) according to the grades of resident physician. The proportions of both irregular working hours and independent working hours without supervision of board certified physician were also evaluated. Results: Response from 80 hospitals out of 97 training hospitals were analyzed. The average duty hour of emergency resident physician was 63.7±10.7 hours/week. The proportion of hospitals that average duty hour exceeding 80 hours/week was 16.1%. Irregular working hours consisted of 63.9%. Residents in 15(18.7%) hospitals worked 3.7~73.5% of their duty without supervision of board certified physician. The higher grade resident had lesser working hours (1st-year resident 71.3±13.1 h, 2nd 65.5±11.8 h, 3rd 62.2±12.8 h, and 4th 55.8±14.2 h, p<0.001). There were no statistical difference in the rate of both irregular work and unsupervised work according to the grade. Conclusion: This study revealed that 9(11.3%) hospitals had the average duty hour above 80 hours/week. Training hospitals should prepare to minimize the impact of duty hour restriction near future in Korea as well as to improve training quality.