Abstract: Unethical Pro-organizational Behavior (UPB) defines the unethical behaviors of the organization's employees to protect the organization's interests. UPB is difficult to be identified in the organization, but it may bring negative effects to the organization. Due to the pro-organizational and immoral nature, the research of UPB has attracted wide attention from all walks of life. Therefore, it is necessary to clarify the origin and definition of UPB. It is also necessary to learn from the interpretation path of "unethical behavior" to theoretically summarize the progress. This progress is made in the research on the cause of UPB from the explanatory mechanisms of rational decision and intuitive judgment to form a theoretical model. On such a basis, future research directions are proposed: the study of Unethical Pro-leader Behavior (UPLB) and Unethical Pro-group Behavior (UPGB); the moderating effect of corporate ownership on UPB in China; and the impact of role stress on UPB.

Key words: Unethical Pro-organizational Behavior (UPB), social identity, social exchange, intuitive judgment, corporate ownership, role stress