Seventh-grade students at MTs Manba'ul Ulum experience boredom and low motivation in learning Arabic due to conventional teaching methods such as lectures, thus requiring the implementation of more creative and student-oriented strategies to improve their understanding and learning motivation. This study aims to analyze the effectiveness of the Mnemonic strategy in enhancing students' mastery of Arabic vocabulary at Mts Manba’ul Ulum. The Mnemonic strategy is a learning method that utilizes association techniques such as images, stories, songs, and word grouping to help students remember vocabulary more easily. The research method used is a quantitative approach with a pre-experimental design, employing a one grup pretest and posttest model. the research sample consists of 18 seventh-grade students selected through purposive sampling. The results indicate a significant improvement in student’s Arabic vocabulary mastery after implementing the Mnemonic strategy. The average pretest score was 41.67, while the posttest score increased  to 77.22. Statistical analysis using the paired sample t-test showed a significance value of 0.000 (p < 0.05), indicating a significant difference before and after applying the Mnemonic strategy. Based on the N-Gain test, students' comprehension improvement falls into the moderate category, with an average score of 0.6288. Thus, the Mnemonic strategy has proven to be effective in helping students memorize Arabic vocabulary more easily and enjoyably.