Focusing on professional codes of ethics in HR, this article establishes a foundation for understanding the contents of thesecodes and for future research in this area. Five key professionalethics codes in HRM are analyzed according to six obligations.The resulting characterizations revealed that these codes advocatefive principles related to integrity, legality, proficiency, loyalty, and confidentiality. Particular flaws in code content and implementationare identified with recommendations for addressing them. Also,suggestions for standardizing professional HR codes and forfuture research are discussed.