The diploma thesis focused on the fairy tale Beauty and the Beast, which is based on the myth about Cupid and Psyche by the Roman philosopher Lucia Apuleio. The aim of this thesis is to compare the selected versions of Beauty and the Beast (the myth Cupid and Psyche, the fairy tale Beauty and the Beast by Charles Perrault, the films by Jean Cocteau and by Fabrizio Costa) and then examine their nature. Based on the narrative of the story this thesis deals with the character of the Beast and examines its hidden values in the ancient and medieval world. Pays attention to the beast and is focused on human and bestial aspects of man and medieval art, however the most importantly on inner and outer beauty and the relation between beauty and ugliness. The primary sources of the thesis are articles The Value of Man and the Origin of Morality by J. M. Rist and Beauty in the Beasts: A study of medieval aesthetics by Debra Hassig, further the Plato’s dialogue Symposium and the ideas of St Augustine at Karel Svoboda’s book Estetika svatého Augustina a její zdroje.