Abstract
Zoroastrian religion, which was first founded in ancient Iran before Islam, introduces the constant conflict between Ahura Mazda, known as the benevolent, omniscient and endless light, and Ahriman which is the endless and absolute darkness and aims to demolish Ahuramazda. For this purpose, Ahriman creates six demons of evil thought including Akoman (equivalent to AvestanAkemManah), Indar, Naonhaithya, Saurva, Taurvi and finally Zauriwhich are incarnated as villains to counter Ahura Mazda’s creation and good thoughts. In a mythological legend like Shahnameh ,Ferdowsi distinctly depicts the battle between evil and human being which ultimately leads to the victory of benevolence. This paper aims to investigate the mythological villainy of Akoman and its defeat by Rustam in Ferdowsi’s great epic Shahnameh.