Epic is the picture of a superman and a hero's story to save the country from the evil. One of the principles of heroes' life is mate selection. The study of their marriage shows that their marriage with a female member of the other opposing group, often representing evil, is guaranteed by the hero's taking a test and pass it. This is called exogamy marriage from a sociological perspective in which the couple may be of different occupational or social groups and vary depending on their geographic region. This means that there is not any limitation, whether ethnic or tribal, familial, urban and rural for mate selection. The main research question is why marriage is with the other countries' girls. The writer tries to answer the question based on the available sources. Based on this model, first, mate selection will be discussed in the national epic. After reviewing the various directions, it will be described and analyzed. The overall result of this research is that the hero's mate selection from a foreign country is to help his country to take control of other country.