This study was carried out with the aim of determining the professional behaviour of nurse executives. The sample of the study included 104 nurse executives working in university, state and private hospitals in Turkey. Data were collected using a questionnaire, which included demographic characteristics of nurses and a Behavioral Inventory Form for Professionalism in Nursing (BIPN). The questionnaire was filled out by the nurses. The BIPN results showed that the mean score of nurse executives was low. Although the scores of nurse executives who had completed postgraduate studies in nursing were the highest, those who had only completed an associate degree programme were the lowest. In conclusion, the professionalism scores for Turkish nurse executives were found to be low; recommendations for improving these scores were made.