This study examines the use of commissive speech act in the candidate debate of Aceh gubernatorial election period 2017-2022. The subjects of this study are four videotapes of the candidate debate that was downloaded from the Inews TV official YouTube Channel. Meanwhile, the objects of this research are the utterances stated by the candidates which contain the commissive speech act. Data analysis was carried out through descriptive qualitative approach using speech act theory proposed by Yule (1996). It is merely found that there are two forms of commissive speech act occured in candidate debate of Aceh Gubernatorial election period 2017-2022, namely promise and pledge. Promise occured 35 times or 58.3% while pledge appeared 25 times or as much as 41.7% of the total commissive utterance found in the debate. It is implied that promise upholds a significant utterances to attract audiences to elect the candidiates as governor.