Objective: To assess Nurses' Knowledge about Nursing Management for Patients with Bariatric Surgery, and to find out relationship between Nurses' Knowledge about Nursing Management for Patients with Bariatric Surgery and their socio-demographic characteristic. Methodology: A descriptive analytic study is carried out to assess Nurses' Knowledge about Nursing Management for Patients with bariatric Surgery. A purposive "non-probability" sample consisted of (50) participants , Nurses should have at least one year of experience or more to participants at study. The study was conducted in the Surgical Teaching Hospital, second floor of surgical ward at Al-Sulaymaniyah Health Directorate in Al- Sulaymaniyah City. Results: The result show in all domain that the nurses have little Knowledge about Nursing Management for Patients with Bariatric Surgery, Where the item related to nurses’ general knowledge about bariatric surgery; the total percentage of nurses’ correct answer refer to 23.5% correct responses, Item related to nurses’ knowledge about pre-bariatric surgery nursing management; the total percentage of nurses’ correct answer refer to 15.1%, item related to nurses’ general knowledge about post-bariatric surgery nursing management; the total percentage of nurses’ correct answer refer to 25.8% , and there is no significant association between nurses’ knowledge and their socio demographic characteristics. Conclusion: Nurses' knowledge about Nursing Management for Patients with bariatric Surgery Was little, and there is no significant association between nurses’ knowledge about Nursing Management for Patients with bariatric Surgery and their socio demographic characteristics. Recommendations More efforts should be done to educate nurses’ about the bariatric surgery, and it is important to encourage nurses to teach patients with with bariatric Surgery during the pre and post period about the bariatric surgery.