In this study, we use implicit leadership theory to investigate how leader integrity, one of the most important traditional Chinese virtues, influences subordinates’ organizational citizenship behaviour (OCB) in the Chinese context. The results of our survey reveal that leader integrity is associated with subordinates’ OCB, and that this relationship is fully mediated by leader effectiveness. In addition, traditionality moderated the relationship between leader integrity and leader effectiveness; the relationship was significant among less traditional subordinates, but insignificant among more traditional subordinates. We conclude with a discussion of the theoretical and managerial implications for leaders in China.