Agus Mulyana Ketua Penguji Nirna Nirmala Penguji 1 Andri Kurniawan Penguji 1 Tenia Ramalia Dosen Pembimbing 1 Sri Mulyani Rahayu Pengarang

This research was conducted at SDN Malangnengah I with the aim of knowing the use of Simon Says Game to increasing students’ vocabulary mastery at third grade. This research uses Quantitative with Quasi-Experimental method. The sample in this research was 65 students from grade 3A and 3B. The data was collected through observation and used pre-test and pos-test. The researcher used SPSS version 22 to analyzed the data, in this analysis using the Wilcoxon Signed Rank Test with the significance value 0.000, it means that 0.000 < 0.05, it can be concluded that Ha is accepted and Ho is rejected. it means that there is a significant effect of using Simon Says Game to increase students’ vocabulary mastery at third grade of SDN Malangnengah I in academic year 2022/2023. Based on this research, the researcher hopes that future researcher can conduct similar researcher with the different English skills.