Method: This was descriptive cross- sectional study that it was assessed (45) nurses’ emergency department viewpoints in hospitals affiliated to Golestan University of Medical Sciences in 2011.They were selected purposively and non-randomly. After the competency based in -service education program on cardio-pulmonary resuscitation was implemented for 6 months. Data by reliable questionnaire (Alpha- Chronbach =0.91) gathered that it contains two parts demographic data and questions in three dimensions of performance, training and supportive services (27 questions) and analyzed by SPSS16 software and descriptive statistics.