This study aimed to find out whether or not reading comprehension of the eighth grade students of SMP Kalam Kudus Bali in academic year 2019/2020 can be improved through STAD. The subject of this study was the students of the eighth grade especially VII B class. This research focused on figuring out the efficacy of STAD in improving reading comprehension, changing learning habit and to find out the factors which influenced the improvement of reading comprehension. The data was collected from the tests and questionnaire. The present study made use Classroom Action Research (CAR) with qualitative and quantitative data. The result of the pretest showed that the ability of the subjects still low and need to be improved. After the implementation of STAD in teaching learning process, the mean score of the subjects was increased and it meant that this technique was successful to improve not only their ability but also it could change their learning habit. It could be seen from the mean score of the pre-test, post-test 1 and post-test 2 was 69.67, 77.29 and 89.19.