Abstract: Nietzsche, Plato and Aristotle on Mimesis This paper compares Nietzsche¡¦s The Birth of Tragedy with Plato¡¦s and Aristotle¡¦s concept of mimesis. In contrast with the prevailing view that Nietzsche¡¦s concept of tragedy is antimimetic, it argues, basing on original research on Nietzsche¡¦s intellectual debt to his contemporary classical scholars (e.g. Rohde, Bernays), that there are many points of convergence between him and the Greek concept of mimesis. It is divided in to two parts: In the first part it shows, basing on an analysis of the relevant passages in Republic, that Plato¡¦s reason for prohibiting mimesis, namely the splitting of a unified subject, agrees in another way round with Nietzsche¡¦s view on mimesis found in his early fragment which are rarely discussed: namely that the dionysiac ecstatic condition is a prerequisite for mimetic performance. In the second part, it picks up Jacob Bernay¡¦s treatment of Aristotle¡¦s catharsis, which argues that Aristotle's catharsis is essentially medical process of channeling ¡§ecstatic affects¡¨. It therefore shows that there is also a strong ecstatic elements in Aristotle¡¦s concepts of catharsis and pathos, and they find agreement with Nietzsche¡¦s view: that there are in each person certain ¡§universal¡¨ pathos barely contained by the unified subject; that these ¡§universal¡¨ pathos and the subject are in constant tension with each other; and that tragedy performance is essentially a process whereby man is freed from these pathos by regarding them as no longer his own. Key words: mimesis, catharsis, pathos, Rohde, Bernays