In literature, rhetorical devices such as description, allegory, irony, and symbol are used. Description rely on expansion, allegory on analogy, irony on contradiction, and symbol on representation. Among these devices that are used enhance the effect of delivery, irony, in particular, is considered as a sophisticated strategy. Oral narratives are particularly suitable for using irony because of its satirical nature. Pansori(판소리) bases its themes on pre-modern norms such as loyalty and filial duties. However, these are only superficial themes, and, in fact, the profound themes are the opposite of them. In Chunhyangga(春香歌), Chunhyang is both faithful and unfaithful. Shimcheong in Shimcheongga(沈淸歌) is, and, also, is not a devoted daughter. The turtle in Sugungga(水宮歌) is a loyalist who commits disloyalty. Nolbu and Heungbu in Heungbuga(興夫歌) come into conflict due to brotherhood, and, in Jeokbyeokga(赤壁歌), faith is put to the test against betrayal. The legend of Kim Deokryeong(金德齡) adds entertainment by using a contradictory theme based on loyalist and traitor, while Story of Secret Lovers enhances the irony by reversing the social hierarchy. Classical literature receives little attention from both the general public and middle and high school students. Part of the reason is because it is written in ancient language that is difficult for them to understand. However, another problem is perhaps the excessive admiration for the Western literature. It is worth noting that irony, which enriches literature, in the Eastern culture, dates back to the period of Book of Songs(『詩經』). Also, in classical Korean literature, especially in the oral literature, irony was often used. It is necessary to explore the use of irony in the classical oral literature in Korea and use it actively in the field of literature education.