Despite of the extraordinary variety of studies on Kierkegaard’s philosophy, his concept of modesty has not received enough attention. My paper aims to present and analyze Kierkegaard’s concept of modesty, as it is developed in The Concept of Anxiety by his pseudonym Vigilius Haufniensis. First, I will try to provide an understanding of some of the major themes of Haufniensis’s book. Second, I examine what the psychological phenomenon of modesty reveals about the subjective structure of the human being.