The purpose of this research is to discuss about the theory of monomyth and to analyze whether this theory which is usually used in myths and legends can be applied to a mystery fiction novel so that the main character in the novel can be depicted as a hero. The theory of monomyth used in this research comes from Joseph Campbell’s The Hero with A Thousand Faces (2004). According to Campbell (2004: 28), monomyth is: “a hero ventures forth from the world of common day into a region of supernatural wonder: fabulous forces are there encountered and a decisive victory is won: the hero comes back from his mysterious adventure with the power to bestow boons on his fellow man”. The standard path of the mythological adventure of the hero is a magnification of the formula represented in the rites of passage: separation—initiation—return: which might be named the nuclear unit of the monomyth. In doing this research, the writer uses qualitative method with a descriptive approach [6]. Based on the result of the analysis, the writer found that the monomyth theory is applied to the novel “Murder on the Orient Express” and the main character is depicted as a hero with some adjustments.
Keywords: monomyth, mystery, hero, separation, initiation, return