中岛敦的《牛人》取材于中国的《左传》,但是却创造了一个与《左传》完全不同的文学世界。在《牛人》中,作为家臣的庶子竖牛,在取得父亲叔孙豹的信任后,通过离间,使其先后失去两位嫡子,而最后,同样是因为竖牛的恶意,叔孙豹被活活饿死。中岛敦着力创造了一个充满恶意的世界,在这个世界里,叔孙豹感到了彻骨的寒意。而本文,将从文学伦理学的角度对作品中出现的伦理事件进行归类梳理,并通过与《左传》的对比客观解读中岛敦对素材取舍的意图,进而把握《牛人》的主题。 Nakashima-kun’s “cow man” is based on China’s “Zuo Zhuan”, but it has created a completely different literary world from Zuo Zhuan. In the cow man, the bastard who served as a retainer, after gaining the trust of his father’s uncle Sun leopard, lost two of his princes in succession, and lastly, because of the malice of the cow, the uncle Sun leopard was activated starve. Nakajima fueled a hostile world in which Uncle Sun Leopard felt a chill. This article, from the perspective of literary ethics, classifies the ethical events appearing in works and objectively interprets Nakashima-jun’s intention of material selection through comparison with Zuo Zhuan, and then grasps the theme of “cow man”.