The present study analyzed C.S. Lewis' The Lion, The Witch, and The Wardrobe, focusing on the formation of the Oedipus Complex in Edmund Pevensie's characters as a reference to understand the motive of his betrayal of his siblings under the influence of the White Witch. Through textual analysis, the study revealed that Edmund's Oedipus Complex was reflected by his desire and need for a mother's approval through the presence of the White Witch. Edmund's fixation on the mother figure instigated his betrayal of his siblings due to his fear of being left by all comforts of the White Witch. His instincts to seek comfort put him as an enemy in the blanket for his siblings and complicated the novel's plot. As literature reflects and affects life, discussing Edmunds' psychology and his Oedipus Complex may shed insight into children's behaviors.