This thesis gives a theoretical view of oral literature, i.e. the conceptual definition of this kind of literature, the relation between oral and written literature and the historical review of oral literature in Croatia. In the center of attention are oral-literary forms that are divided into seven areas. The aim of the subject was to explain the concept of oral literature more closely, to isolate oral-literary forms and to further analyze them through examples and to conduct the research. In the research part of this graduate thesis the results of the documentation study method and the interview method are presented. The emphasis of the first research was on the representation of oral-literary forms in the Republic of Croatia, divided into five regions, for the sake of analysis quality. The results of the students seminar papers research, which were the starting point for the research of this Thesis, lead to the conclusion that the representation of the forms of the oral literature is extremely significant, and there are also many similarities and differences of the oral-literary forms in the Republic of Croatia. As the examples proved that numerous forms of oral literature appeared as part of the wedding practices, another research was conducted through the method of interviews. The research has pointed to the similarities and differences in oral-literary forms within the wedding customs of Slavonia and Lika.