[Excerpt from authors] Nurses have assumed management positions in many health institutions. To properly accomplish the demands of this role, it is important that they be competent in both management and leadership. For appropriate performance, knowledge of management and supervision styles is a priority. Therefore, the goal of this investigation is to identify the nurse manager's knowledge regarding management and leadership. A structured questionnaire containing twenty-seven questions was applied to twelve Brazilian nurse managers of primary care center called "Family Basic Health Units". Data analysis suggested that the nurse manager lower knowledge in management and leadership is related to visionary leadership, management and leadership conceptual differences, leader's behavior, and situational leadership. And, nurse manager greater knowledge is related to power; team work, and coherence between values and attitudes.