Background: Clean cord care is one of the essential priorities of newborn care. Despite this, cord infections are still prevalent in developing countries because of high rates of unhygienic cord care. This study aims to improve the knowledge of women about the newborn's umbilical cord care. Methods: quasi-experimental research design was utilized in this study. A convenient sample recruited 135 women from six health facilities in Al- Hodeida governorate-Yemen. Results: The current study shows that 43% of the studied women know the importance of cleaning and sterilizing the instruments before cutting the cord in pre-test. It is improved to 100 in post-test and decline to 67.4% in follow up. There was a statistical significant difference between women's knowledge and their residence and parity in pre, post and follow up tests with p=0.040, 0.010 and 0.012. Conclusion: The Studied women had unsatisfactory total score knowledge about umbilical cord in pre-test. But their knowledge had improved in immediately post-test among most of them and they had satisfactory knowledge. Also, some decline occurs in follow up test but it is still better than pre-test. Recommendations: Essential newborn care information as cord care should be provided to women during antenatal. Moreover, we must increase health awareness campaigns on essential newborn care which is required for the women to improve maternal knowledge about cord care.