Background: Nurse managers' perceived power is a crucial part of increasing the productivity and the caliber of any healthcare organization, as well as the organizational commitment which leads to continuous growth and results in success. Organizational commitment is the close relationship between nurses and the organizations where they work and one of the essential factors that affects on is perceived organizational support and nurse managers' perceived power. Aim: To assess the relationship between perceived power in nurse managers and nurses' organizational commitment. Design: Descriptive correlational research design was used. Setting: It was conducted at Dr. Sulaiman Al Habib Hospital in Aryan which is affiliated to the Saudi Arabia Ministry of health and population. Sample: All staff nurses (N=600). Tools: Two tools were used: Perceived power in nurse managers' scale and Organizational commitment scale. Results: Less than two thirds of staff nurses had total moderate level of perceived power in their nurse managers. While more than one fifth had low level and only (19%) of them had high level. Conclusion: There was highly statistically significant positive strong correlation between total perceived power in nurse managers and organizational commitment among studied staff nurses. Recommendations: Provide staff nurses with training programs about perceived power in nurse managers and organizational commitment to enhance their professional development. Further studies about the relationship between perceived power in nurse managers and staff nurses' occupational stress can be conducted.