Nurses are the largest human resource group and backbone of every health care system. Head nurses are the key to professional communication between the top management and staff nurses, their role is highly important in the success of healthcare organizations so this require certain skills and practices are very important to increase nurses innovation and Sustainable development behaviors. Aim: to assess the relation between leadership competencies and sustainable development behaviors of nurses. Subjects and Method: A descriptive correlation design was used to achieve the aim of this study. Setting: The study was conducted El- Sinbelawin General Hospital, Dakhlia, Egypt. Subjects: Simple random sample from nurses (n= 240). Tools: leadership competency scale and sustainable development behaviors scale, Results: near half of the studied nurses reported that head nurses had a high level of leadership competencies. While, more than half of the studied nurses had a high level of sustainable development behavior. Conclusion: there was statistically significant positive correlation between leadership competencies, sustainable development behavior. Recommendations: Conduct workshops on innovative thinking and develop strategies to enhance nurses' level of sustainable development behavior, As well administer continuous learning about modern and innovative ways of leadership to update and promote leadership competencies of head nurses.