This study aimed to analyze assertive speech acts in the Hakata dialect. The study employed a descriptive qualitative method. The data in this study were taken from the novel Tokyo Tower by Lily Franky which used the Hakata dialect. In analyzing the data, this study used Searle's speech act theory. Based on the analysis of this study with a total of 303 data, there are seven types of assertive speech acts used in the novel. The seven types are asserting (42), describing (83), complaining (49), stating (49), suggesting (47), warning (24), and boasting (9). These seven types are the results of the analysis based on the frequency of occurrence which uses the Hakata dialect in the novel. The representatives of the Hakata dialect can be seen from these types of assertive speech acts. Representatives of Hakata dialect that often appear are the negative form of the verb, the use of two aspect suffixes '-yoru' and '-toru' as a change from progressive verb 'te iru', the use of the final particles 'bai' and 'tai' and '-ken' as a substitute of the conjunction kara.