This study is concerned with code-mixing phenomenon on Muna language speakers at Wisma Pahlevi, Pogung Dalangan, Yogyakarta. The objective of the study is to find out and describe the types of code mixing in Muna language speakers’ utterances. The data of this study were collected through participation, recording, and noting, and then analyzed by using morphological, semantic, and syntactic analysis. The writer used these three kinds of analysis because Muna language is a unique one. It means that one word in Muna language sometimes can be one word or one morpheme only, a phrase, a clause or a simple sentence. Based on the writer interpretation, the result of the study shows that the types of code-mixing found on Muna language speakers’ utterances residing in Yogyakarta are only code mixing on word insertion, phrase insertion, clause insertion, and reduplication insertion.