Abstrak
This study aims to examine the correlation between students’ grammar knowledge and their reading comprehension at the eighth grade of MTsN 3 Agam. Grammar knowledge is essential for constructing meaning and coherence in texts, while reading comprehension requires the ability to interpret and analyze written material. Many students struggle with reading tasks due to limited grammatical understanding, which affects their ability to comprehend texts effectively. This research used quantitative approach in the type of the correlation design. The population of this research was all class of the seventh grade in MTsN 3 Agam. The number of samples in this study was obtained by conducting lottery. Each class will draw the names of students as many as 7 people for three class and eight people for two class. The eight grade level at MTsN 3Agam is six classes. Then 38 students will be obtained as the sample of this study. The data was got by grammar test and reading test. The data of the test were taken from the students’ final scores in the test grammar and reading comprehension. To analyze the data, the researcher used the SPSS version 26 for windows. In analyzing the data, the researcher used Person Product Moment formula to find out the significant correlation, to find out the correlation direction and to find out the correlation magnitude of students’ grammar knowledge and reading comprehension. The results of the research showed that there was a correlation between students’ grammar knowledge and reading comprehension at the eighth grade of MTsN 3 Agam. The researcher found that the coefficient of correlation between students’ grammar knowledge and reading comprehension at the eighth grade of MTsN 3 Agam was 0,366. The correlation was positive and significant. It means that Ho is accepted and Ha is rejected . Thus, there is a positive correlation between students’ grammar knowledge and reading comprehension at the eighth grade of MTsN 3 Agam. Based on the result of the research, it can be conclude that if the students have high grammar knowledge automatically she/he have low ability in reading comprehension or when the students have low grammar automatically she/he have high ability in English reading comprehension.