Background: Approximately 25% of pregnancies and births in Egypt are unintended. Emergency contraception (ECC) is a critical tool to reduce unwanted pregnancy after unprotected intercourse. Aim: aimed to assess the knowledge and attitude of married women in reproductive age regarding emergency contraception and their acceptability of unplanned pregnancy. Design: using a cross-sectional descriptive design.Subjects; on a sample of 300 married women in the reproductive age. Setting: The study was conducted in Elhadary Health Care Center in Ehnasia village, Beni-Suef governorate Methods: A structured interview questionnaire form was used to measure their knowledge of Emergency contraceptive, related attitudes regarding unplanned pregnancy. Results:  Women's median age was 30.0 years, mostly gravida 2-3 (52.3%), and 27.0% had previous unplanned pregnancies. Only 52.7% had satisfactory knowledge with ECC regarding and 56.0% had a related positive attitude, and in 92.3% of them the pregnancy was unplanned. The scores of knowledge and attitude correlated positively with planned pregnancy (r=0.140 and r=0.682 respectively). Women and husbands' higher education and their good obstetric history positively predicted their scores of knowledge, attitude, and planned pregnancy. Conclusion: Women's knowledge of ECC and related attitude are suboptimal, with high rate of unplanned pregnancies. Recommendations:  Promotion of women's knowledge of unplanned pregnancies and ECC and related attitudes is recommended through counseling and educational programs. Advance study is proposed to examine effect of educational programs on utilization of ECC and on reduction of unplanned pregnancies.