Background: Clinical nursing competence is the capacity to apply care by integrating information, skills, attitude, beliefs, and experience. It reflects the nursing professional's feelings, ideas, and judgment. Aim of study: to evaluate the effect of competency based education model on nurses' performance regarding active management of second stage of labor. Design: Quasi experimental design was used. Setting: The study was conducted in labor unit to collect data from Rofyda Maternity Hospital at Sheikh Zayed, Cairo, Egypt. Sampling: A purposive sample 30 nurses according to inclusion and exclusion criteria. Tools: Five tools for data collection were used. First tool: a structured interviewing questionnaire included nurses' personal characteristics. Second tool: Nurses competency knowledge assessment checklist. Third tool: Nurses competency practices assessment checklist. Forth tool: Nurses' attitude toward competency education model. Fifth tool: Nurses' satisfaction toward educational sessions regarding active management of second stage of labor. Results: the majority of the studied nurses had competent regarding level of competency practice of second stage of labor post implementation of competency based educational model regarding active management of second stage of labor with highly statistically significant difference in nurses' knowledge performance in pre and post implementation of competency based educational model. The majority of nurses had positive attitude post competency-based educational model. Conclusion: The implementation of the competency-based educational model improved nurses' performance regarding second stage of labor. Recommendation: Develop competency based training courses for nurses working at labor room regarding care of different maternity nursing subjects.