This study develops and tests a model based on affective events theory. It specifies that engaging in unethical pro-organizational behaviors (UPB) decreases employee task performance through depression. Specifically, employees engaged in UPB are more likely to be depressed for those with a high rather than a low level of self-reflection, which in turn decreases task performance. Based on a sample of 205 sales employees in an insurance company located in mainland of China, we found that UPB had a significant indirect (...) effect on task performance through depression; additionally, this effect was stronger for employees with high rather than low levels of self-reflection. (shrink)