This research is aimed to analyze the speech acts of dialogue found in the tenth-grade of senior high school student’s English textbook; Published by Ministry of Education and Culture and to explain out the pedagogical implication of the speech act to the English teaching and learning. Speech acts is the study of meaning and context. The research is classified into qualitative content analysis research. The data were collected from the dialogues in the English textbook; Published by Ministry of Education and Culture. Documentation and interview were used to collect the data since the research question was to analyze the types of speech acts used in the dialogue of the English textbook and to explain out the pedagogical implication of this research to the English learning and teaching. The key instrument used in this research is the researcher’s knowledge of the speech acts. As the supplementary tools of the instruments, some forms of data sheets were used during the research analysis. The data were analyzed by reducing the data, displaying the data based on the classifications of speech acts and drawing a conclusion. The result of this research was that speech acts found in the dialogue of tenth-grade of senior high school student’s English textbook were declarative as the highest frequency of locutionary acts (76.15%), representative as the highest frequency of illocutionary acts (43.33%), and knowing something as the highest frequency of perlocutionary acts (33.92%). Based on an interview with the teacher, there is no specific material in curriculum K13 discussing speech acts (meaning and context) for the tenth-grade of senior high school. It depends on the teacher him/herself to improvise the material to give some examples that relate to speech acts.