In closed social systems the social position of an individual is determined by the social position of the family into which he or she was born, whereas in open social systems mobility from one social class to another is possible. This paper concerns the relationship between the class position an individual actually occupies and the class into which he or she was born. First the concept of social class is described and different types of social mobility are presented. Than the research methodology is described and the results are presented and discussed. At the end of the paper certain comparisons to other European countries are made. V zaprtih družbenih sistemih je družbeni položaj posameznika določen s položajem družine že ob človekovem rojstvu. V odprtih družbah pa prihaja do vertikalne in horizontalne družbene mobilnosti, katera je predstavljena v prispevku. V Sloveniji je v času tranzicije mnogo ljudi, zaposlenih v industriji izgubilo službo, po drugi strani pa so se mnogi zaposlili v storitvenih dejavnostih. Stopnja družbene mobilnosti je bila zato zelo velika. V prispevku predstavljamo družbene razrede, različne vrste družbene mobilnosti ter raziskavo družbenih razredov v Sloveniji. Na koncu rezultate primerjamo tudi s stanjem v Evropi.