This study have an aim to find out the truth that 25 unexplained(avyākata) views in early Buddhist scriptures 『Pāsādika sutta』 and cognitive triad of depressive disorder have some cognitive similarities, and these are the cause of agony and mental obstruction in human beings. 25 unexplained views and cognitive triad have some similarities. The first, the main subject of them is a “self” in content, secondly, they have a dichotomous thinking system in form. And thess similarities are the result of cognition overturning or cognition distortion by the intervention of an idea in the cognitive process. In Buddhism, attachment to the five aggregations makes a self-concept, this result give rise to cognition overturning, and biased views that are wrong. In cognitive therapy, depressed person builds up dysfunctional schema from the early infancy and sets up negative automatic thinking from the dichotomous thinking as the one of the cognition distortion that caused by ideal characteristics of cognitive schema in the deep part of the mind. In consequence, 25 unexplained views and cognitive triad bring about fundamental and psychological sufferings as the representation of an idea not a real world that ever-changing.