Whistleblowing has emerged as a result of individuals' ethical values, and an action which aims to prevent adverse outcomes of ethical events in the organizations. In health organizations, whistleblowing is so important due to the health of people. The aim was in this study determining whether the preferences of whistleblowing studies of nurses in the public or private hospitals. In study also, the relationship between the ethical values and nurses' whistle-blowing decisions were discussed. The research population consists of the working nurses in government and private hospitals at Isparta. In this research scope the total of nurses 280 have been reached. In the research whistleblowing and ethic philosophy questionnaires were used. In the research result, the whistleblowing preferences effects inner and anonymous were determined with more ratios of the working nurses in private hospitals to the working nurses in public hospitals. Nurses at private hospital act more relativist and also the relationship between ethical values and whistleblowing was found. As a result has been reached that the ethic values is the determining of the whistle-blowing behaviors of nurses.