Background: Good maternal health, and fetal development require sufficient and good quality of sleep during pregnancy. Aim of the study was to investigate the effectiveness of instructional tips of sleep hygiene in improving sleeping disorders of pregnant women and their effect on the outcome of pregnancy. Design: A quasi-experimental study design. Setting: The study was conducted at Obstetrics and Gynecological department affiliated to the Benha University Hospital. Sampling: A purposive sample included (120) pregnant women divided into two groups control group (60) and study group (60). Tools: Five tools were used, tool I): A structured self-administrated questionnaire sheet which included three parts: general characteristics of pregnant women, obstetrical history and Jenkins sleep scale, tool II: Pittsburg sleep quality index, tool III: An assessment sheet of maternal and fetal outcome, tool IV: Numeric rating scale and tool V: Apgar score. Results: There was a highly statistically significant improvement of sleep disorders and positive pregnancy outcome after applying instructional tips of sleep hygiene among study group compared to control group. Moreover, there was a highly statistically significant positive correlation between studied women's quality of sleep and the duration of the three stages of labor as well as, the women pain score during the three stages of labor. Conclusion: Applying of instructional tips of sleep hygiene had positive effect on improving sleep disorders and outcome of pregnancy. Recommendations: Instructional tips of sleep hygiene are recommended as an alternative non-pharmacological method, which can be applied at antenatal clinics.