To the extent that contemporary scholars Feng Youlan, Wang Shumin, and Cui Dahua recognize Xunzi’s engagement with Daoism, they have focused on his debt to the Zhuangzi. While Xunzi did borrow from the Zhuangzi, the phrases and nature of this borrowing have not yet been completely understood. Xunzi did pay a great deal of attention to theories of argument. In the “Fei xiang” chapter, Xunzi said, “A gentleman would definitely argue.” However, in the “Bu gou” chapter, he stated, on the contrary, that a gentleman with high virtues could make himself understood even by saying nothing. This article attempts to bring out the discussions on Xunzi’s theories of argument which intended to engage a debate with Zhuangzi. On the other hand, by pointing out the evidence, this article also proves that Xunzi did borrow some phrases and expressions about theories of argument from the Zhuangzi. The particular focus is on the conceptual relationship between the argument theories in the Xunzi and that in the Zhuangzi. The author points out that in taking these stances Xunzi did follow Zhuangzi and this element was incorporated into the thought of the Xunzi. However there were cases where Xunzi did reject Zhuangzi’s assumptions.