Background: Obstetric triage is one of the most important management and decision-making. Aim of the research: Was to evaluate the effect of educational program on nurses' perception regarding obstetric triage. Research setting: The study was conducted at obstetrics and gynecological emergency department at Benha University Hospital. Study design: A quasi-experimental design (one group, pre-posttest) was followed to fulfill the aim of the study.  Study sampling: A convenient sample included 40 nurses. Tools of data collection: Two tools were used of data collecting data, self- administered questionnaire and modified likert scale for nurse's attitude toward obstetric triage Results: The minority and less than one tenth of the studied nurses have good knowledge and positive attitude regarding obstetric triage before implementation of educational program which improved to most of the studied nurses have good knowledge and positive attitude after one month from implementation of educational program, with highly statistical significant difference (P ≤ 0.001). Conclusion: The educational program has a positive effect on improving nurses' knowledge and attitude regarding obstetric triage. Recommendation: Implementing continuous educational training programs about obstetric triage for maternity nurses should be provided.