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This study aims to find out the description of the use of educational game media and its effect on the mathematics achievement of grade 6th elementary school students. This study included quasi-experimental research with a pretest-posttest control group design. This study involved 29 6th grade students at SD Negeri Tombolo K 2018/2019 academic year. Determination of sample was done by using simple random sampling technique. Students’ mathematics learning outcomes data are obtained by using test of students’ achievement in essay forms (pre-test and post-test) given classically to students. The data obtained were analyzed using descriptive statistical analysis techniques. While to obtain data on students’ and teacher’s activities, an observation sheet was used. The results of this study indicated that the average value of students’ achievement before and after the use of educational game media has increased from 47.69 to 86.54. The test scores of students’ achievement were only centered on the medium, low, very low category before the use of educational game media. The average score in the very low category is at 31.92 with a frequency of 13 students, low category is 49.50 with a frequency of 10 students and for the moderate category is 61.66 with a frequency of 6 students. The average value of student’s achievement after using of educational game media increased with a high category of 81.58 with a frequency of 19 students while for the very high category 91.50 with a frequency of 10 students.

educational game media; students’ achievement