Dede Korkut Stories, narrating economic, political, cultural and moral dimensions of Oguz tribes, contains a complete life aspect of an era and a nation. This is why, Dede Korkut Stories have been thoroughly analyzed by culture researchers and valuable contributions to our cultural treasure have been made at the end of these researches. Dede Korkut Stories, which are one of the most significant memory reservoirs of Turkish culture, are narratives in which dramatic action is ensured through comparing ideal values and counter-values and emphasizing contradictions between these two. These stories have a significant place among works based on narrative in Turkish literature. It is accepted by almost all of the researchers that, besides their affective dimensions, these stories have a deep and multi-layered intellectual structure. Based on these structures, there are positive demeanors such as unity of family, love, honesty, respect, aesthetics, being honorable, solidarity, patriotism, generosity in these stories. On the other hand there are negative demeanors such as betrayal, lying, misleading and cheating in Dede Korkut Stories. In this study, it is attempted to show the conflicts among values while following the positions of the twenty five lies told in eleven stories out of twelve in The Book of Dede Korkut. Lies in these stories are chronologically analyzed in terms of the people who tell lies, to whom these lies are told, time, space, reaction and result. In scope of the document analysis, twelve Dede Korkut Stories are analyzed through content analysis. In the first section, it is intended to present the concepts of value in Dede Korkut Stories. In the second section the definition of lie and classification of it is elaborated. In the third section of the study, the people who tell lies in the stories, purposes and results of the lies are evaluated.