Abstract Nurses assume a key role in giving a high quality of maternal services all through the antenatal period, labor and postnatal those contribute to reducing maternal and prenatal death. They are responsible for caregiving, providing up-to-date health education and listening to clients’ suggestions about the services which women need. Each individual within the organization should have a specified role, which is reflected in the job description. The Aim is to assess the expected roles of the obstetric staff nurses versus their actual role, on a sample of 40 nurses at the obstetrics and gynecology departments' settings at the maternity and child health hospital. A descriptive comparative research design was utilized. Data was gathered from November 2017 to January 2018 Tool. The Staff nurses' role Assessment Questionnaire to assess the obstetric staff nurses expected and actual roles. Results demonstrated that there was a statistically significant difference between the staff nurses expectation of their role and their actual observed practice in their Post-natal nursing care role, and there was an adequate expectation of the staff nurses only at their Antenatal nursing care role, Administrative, and communicator role, and adequate actual performance only in their Antenatal nursing care role. It concluded that the staff nurses expectation/actual performance for those in “morning” shift is better than “afternoon” shift by 0.151 and for those “night” shift by 0.194, and for those who are “30-39” years is less than those who are “<20” years old by 0.287, and for those who have “bachelor of nursing” as level of education is greater than those who have “others” as level of education by 0.363, Therefore, it is recommended that there was a need for job description and it should be drawn up in consultation with employees; to increase commitment, and to reduce role ambiguity.