Tradition, in its broadest sense, is the total of the knowledge, customs and the behaviors passed down from generation to generation. It is widely known that the cultural heritage, the knowledge based on experience, the customs and the behaviors are archived in oral tradition. This knowledge is passed down through rituals, signs and communication which are comprised of codes. The transmission of the customs, knowledge, rituals, signs and symbols in Turkish folksongs are realized through the repetition of the text along with a melody. Turkish folksongs have the characteristics of a musical archive and it is possible to achieve data on the areas of folklore thanks to this archive. The text of the folksong Dunur Aga can be considered as a guide to the wedding customs and rituals of Catalzeytin district of Kastamonu province. In this study, the content of Dunur Aga folksong will be analyzed through its text and performance and its contribution to the cultural transmission function [education] with its content through signs, representations and symbols will be evaluated. Although the origins of the folksong is unknown, it is thought that both financial and emotional difficulties of the marriage in Kastamonu at Catalzeytin and the need for a communication resulting from the difficulties of "giving sons in marriage" are effective in the creation of the folksong.