The article investigates the functions of the warrior class or the hero in the ancient and epical time, as it is described in Ferdowsi’s Shahname. Therefore, it studies from a functionalist approach, the role of this class in political activities at the ancient Persian society. That is, the warrior class has been engaged in various activities such as: organizing society, preserving security, helping the king in ruling the country, training the princes for succession, coronation, struggle with the evil, laying down the ethical boundaries, protection of the throne, preventing the king’s oppression and cruelty. The research has also introduced a definition on myth, epic, and king’s policy, and formulated a theory to explain data. Fedowsi’s reasons for composing Shahname has also formed the history chapter of article. Finally, the article comes to its last conclusion.