This research was about the effectiveness of using text twist game to improve students’ vocabulary at the 8th grade students of MTs Miftahul Huda Kedungleper in the academic year of 2020/2021. The purposed of this research To find out the improvement of students’ vocabulary mastery by using text twist game and to find out effectiveness is text twist in improving students’ vocabulary mastery at 8th grade students of MTs Miftahul Huda Kedungleper inthe academic year of 2020/2021This research was a quasi- experimental research by using nonequivalent control group design. The population of this research were the eighth grade students of MTs Miftahul Huda Kedungleper which consisted of 106 students. The sample of the research was VIII A as experimental group and VIII B as control group, that every group consisted of 20 students. The sample was taken by using purposive sampling technique. There were two variables in this research, they were text twist game as the independent variable and students’ vocabulary mastery as the dependent variable. The instrument of this research was pre-test and post-test. The result of the test’s data indicated that there was a significant difference between both classes, the mean score of pre-test in experimental group was 67 and the mean score of pre-test in control group was 66,3. Meanwhile, the mean post-test score in experimental group was 88 and the mean post-test score in control group was 78,8. It meant that text twist game improving students’ vocabulary mastery. From the calculation of independent sample t-test in post-test, the result showed that the value of ttest > ttable (6,632 > 1.685). Because the value of t-test > t-table indicated that the alternative hypothesis (Ha) is accepted and the null hypothesis (H0) is rejected. Based on the findings and the discussion of the research, the researcher got a conclusion that that there is a significant difference between students’ who are taught by using text twist game in vocabulary mastery than students who are not taught using text twist game.