Key Words: Effect, Jeopardy Game, Vocabulary Mastery, Tenth grade Student of Senior High School. The objective of this research is to know whether there is any positive effect of using Jeopardy game on the students’ vocabulary mastery at the tenth grade students of Muhammadiyah Senior High School Tegal in Academic year 2016/2017. The research hypothesis is the using of Jeopardy Game give…