Background: The obstetric triage nurse is often a patient's first point of contact with the birth unit. The triage unit nurse is instrumental in identifying the patient who presents with urgent or emergent conditions and preventing denial and delay in appropriate care. So the Obstetric Triage Education course is the first course addressing obstetric triage unit nursing care and is an essential component in a triage unit nurse's orientation. The aim is to assess the effect of implementing triage training on obstetric nurses' performance. Research Design: quasi-experimental pre/post-test design Setting: Conducted at Maternity and Child Minia University Hospital's delivery, labor, filter clinic, and highly dependent unit on. Sample: A convenient sample of all nurses (63 nurses). Tools: Two tools: the first tool consisted of two parts: (1) a self-administered questionnaire; the second part (2) assessed the obstetric nurses' knowledge regarding obstetric triage; the second tool (3) was an observational checklist to assess the nurses' practice. Results: findings of actually study this   demonstrates that no nurses had adequate knowledge pre-triage training program compared to 64.40 % of nurses had adequate knowledge post-triage training program. Additionally, 83.10 % of nurses had satisfactory level of total practice post - triage training program compared to 0% pre-triage training program. Conclusion: The level of knowledge and practice had increased after the implementation of the triage training program (p  0.001). Recommendation: Regular educational programs are needed for nurses to maintain and refresh their knowledge and practice regarding obstetric triage.