This study deal with the analysis of politeness strategy used in Bataknese Traditional Wedding Ceremony in Mangulosi. Mangulosi tradition is required in the life of the Batak Toba’s people, because in this tradition the meaning contained in it has an important influence on life. The Mangulosi tradition is a form of parental love to children and giving blessing to children. This study used descriptive qualitative research. The object is people who gives the utterance of Toba Batak wedding ceremony of Sumarlin Rambe and Nenci Br. Simanjuntak. The collecting data has applied the observation with camera phone as the instrument. The findings of the study showed that three politness strategies found in Mangulosi in Batak Toba wedding ceremony, namely: Bald on Record, Positive Politeness, Negative Politeness, specifically, 8 (26,7%) for Bald on Record, 20 (66,6%) for Positive Politeness, 2 (6,7%) for Negative Politeness. The most dominant types of politeness strategies in Mangulosi were Positive Politeness. This type was dominant type because positive politeness strategy is an important thing for daily communication because by applying it the message can be accepted by the hearer well.