Purpose: The purpose of this study was to examine the effects of simulation-based training applying situation-background-assessment-recommendation on self- efficacy and communication skills in new nurses. Method: This study applied a one group pretest-posttest design, with 88 new nurses in a general hospital in S city, Korea. Data were collected from March to November 2017. The participants completed their simulation education program in 4 weeks. Data were analyzed using paired t-test with SPSS program. Results: After SBAR simulation education, self- efficacy (t=-2.40, p=.014) and communication skills (t=-5.24, p<.001) significantly improved. Conclusion: This suggests that simulation-based training applying SBAR, improved self- efficacy and communication skills in new nurses.