This paper is the result of a study entitled: The Role of Falia Expression in Forming the Character of a Child in Ethnic Muna, in Muna District, Southeast Sulawesi. The objective of this study is to uncover and analyze the role of falia ‘taboo' expressions informing child's character. The method used is descriptive qualitative by an elicitation, interview, recording, and noting techniques. The results of the analysis found that falia expression was instrumental in character building of children in ethnic Muna. Falia expression is awaken the character's child from undisciplined being disciplined, from lazy be diligent, of not respect other people be respectful to others, be honest from the dishonest, unfair from being fair