This research is a comparative study of the holy marriage between the female from over the sea and the native male in the myths of Jeju-island and Miyakozima. It analyzes the myths having this motif and discusses the mythological meaning of it. In the myths of Jeju, the female deity is the symbol of advanced culture or magical power which is origined from the external. And the native male deity means the internal that is confronted by the external. The marriage shows that the internal accepts the exteranl, and the divorce which is the end of that marriage shows how the accepted external influence is settled into the internal system. I think that such marriage myths have been telling the history between Jeju and its external. In the myths of miyakozima, the groom is not a deity but a human being. The marriage with the female deity means that she gives the blessing and divine fertility to him. In the end of the myths, She goes back home and he becomes to the ancestor of people, who make sacrfices to not only him but also her as the goddess in the origin of blessing power. So, I think that these myths are telling how man become to blessed with divine fertility. Consequently, I can conclude that the meanings and features of marriage mytheme in Jeju and Miyako differ from each other. The \'over the sea\' is the space of divinity and blessing in Miyako\'s, but it is \'the external\' in Jeju\'s. I consider the myths containing this mytheme as a kind of discourse. The myth of Miyako is regarded as a discourse about religious origin, but of Jeju, it can be regarded as a discourse about history.