The purpose of this paper is to examine the possibility of denying the existence of ghosts through scientific thinking. In the past there has been a tendency to think that immature children mistakenly believe in “paranormal phenomena” and it is not fully understood how rational adults are able to believe in them. This study examines the relationship between belief in “paranormal phenomena” and scientific thinking. The results of this study show that the acquisition of scientific thinking has no effect on the denial of the existence of “paranormal phenomena”. It is suggested that the premise of immature children believing in “paranormal phenomena” should be revised.