This research about The use of Domino game to improve students? vocabulary mastery at the eight year student of SMPN 1 Grabagan in the academic year 2014/2015. The problems of the research: Can the use of Domino game improve students? vocabulary mastery in eight grade of SMPN 1 Grabagan? How is the class situation when Domino game is implemented in the class? According to statement of the probl…