Decreased sleep quality is a common complaint during pregnancy especially among primigravida. Regarding the high incidence of sleep disorders during pregnancy and their adverse effects on maternal and fetal health, it is hazardous to apply pharmaceutical approaches during pregnancy. Relaxation and guided imagery are forms of the non-pharmacological treatments for managing sleep disorders. Aim of the study: was to study the effect of non-pharmacological interventions on sleep quality during pregnancy among primigravida. Methods & Research Design: a quasi experimental design was used in this study with comparing three groups two study and one control. Subjects: A purposive sample of one hundred and twenty women was recruited. Tools: three tools were used for data collection which named; interviewing questionnaire, Pittsburgh Sleep Quality Index and an evaluation checklist. Results: there was a statistically significant difference between groups regarding daily sleep time, PSQI score and sleep quality after intervention. Conclusion: the first research hypothesis was accepted as it was found that progressive muscle relaxation 'as one of the non-pharmacological interventions' was effective in improving participants sleep quality. Recommendations: Instruct pregnant women about appropriate non-pharmacological interventions which have no side-effects to improve sleep quality.