Background: An attractive working environment is one of critical factors that assist head nurses to improve   citizenship behaviors and encourage their innovation.  Aim: The study aimed to investigate working environment and its relation to head nurses' organizational citizenship behavior and managerial innovation at Main Mansoura University and Elmahala General hospitals.  Methods: The study was conducted in all inpatients at both hospitals. The total sample was 140 head nurse. Three   tools were   utilized:    working environment, organizational citizenship behavior and managerial innovation questionnaires Results: The result   showed   total agreement of working environment at Main Mansoura University Hospital was higher than Elmahala General Hospital. Also the total agreement citizenship behavior was highest at Elmahala General Hospital rather than Main Mansoura University Hospital. Finally, total agreement of managerial innovation at Main university hospital was higher than at Elmahala General Hospital. Conclusion: This study concluded that statistically significant positive relationship between working environment with both variables. So, a probability of enhancing organizational citizenship behaviors and managerial innovation throughout enhancing their working environment. Recommendations: Healthcare administrators must focus to improve healthcare working environment that nurtures organizational citizenship behavior and innovation.