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There is a great accordance between Campbell’s mono myth and the archetype of hero’s journey in the epopee of “Mehro-mah”. Mah, Bedakhshan’s prince, has been invited to a journey by seeing a dream about Mehr who is the princess of Rome. King of Bedakhshan attempts to present that dream as an imagination and not real and avoid his son of going to that far land. However, the mendicant of Bedakhshan cave encourages Mahr to start his journey with mercury. In his journey, Mah encounters so many dangers and was able to overcome the examinations and finally marries Mehr. After getting together with his beloved, he feels reluctant to return to his home town. However, in one Spring celebration he suddenly remembers of his father and land. At the same time Khezr appears in front of him and informs him of his father’s death. The shocking news turns Mah in such a distressed condition that leads to his death. Later Mehr and other close friends of them also passed away and they were all buried in a garden which was later called “Rozatol-ahbab”.This essays tries to match the steps of hero’s journey to Campbell’s theory. The archetype of journey to which most of the hero’s journey can be matched has been founded by Josef Campbell based on Jung’s opinion. According to this theory the hero’s journey is constructed in three levels : 1.transformation 2.atonement 3.return. the main core of this theory is called mono myth.