In consideration of the fact that public administrations worldwide face a number of challenges, many governments are dedicated to improving the ethical climate in public administrations. Th e same issue is also the focus of the attention of many transnational associations. Th e basic goal is to ensure the development of comparable ethical climates, ethical behaviour in diff erent public administrations and to develop comparable, suitable ethics infrastructures to enable this. Modern public administrations must bring ethical conduct to the fore and resist unethical behaviour. Th ere are diff erent ideas on how to build ethics infrastructures in public administrations, and examples of good practice that could facilitate the development of such infrastructures are found in the public and private sectors of diff erent countries. In this paper, we connect ethics infrastructures and ethical climates. Th e evaluation of Slovenia's ethics infrastructures is based on the framework prepared by the OECD, using its questionnaire developed by Victor and Cullen. Th e results show that there is no general relationship between ethics infrastructures and ethical climates in public administrations. Nevertheless, some determinants of ethics infrastructures correlate to a high degree to the ethical climate, the strongest impact on ethics climates being the ethical infrastructure's determinant "public involvement and scrutiny".