Background: Preeclampsia is a life-threatening condition, which carries adverse effects for women and fetus. Lifestyle modification can modify the preeclampsia and improve its outcomes. Educational programs are an effective method to modify the lifestyle among pregnant women with mild preeclampsia. Methods: Aim of the current study was to evaluate the effect of an educational program on modifying lifestyle among pregnant women with mild preeclampsia. A pre and post research design was utilized on a purposive sample of 40 pregnant women at 20 – 24 weeks of gestation with mild preeclampsia at the antenatal outpatient unit, Port Said Maternity Hospital, Egypt; they get information regarding the proper lifestyle for mild preeclampsia and the lifestyle dimensions were assessed at the pre- program and post-program phases. Two tools were used for data collection: Interviewing Questionnaire Sheet and Lifestyle Questionnaire. Results: The findings showed a statistically significant improvement in the lifestyle after conducting the educational session. Conclusion: Educational programs about the proper lifestyle for mild preeclampsia through a PowerPoint presentation and distribution of the booklet are an effective method to modify the lifestyle among pregnant women with mild preeclampsia.