PURPOSE: The purpose of this study was to explore factors related to internet game addiction for adolescents. METHOD: This study was a cross-sectional survey, and data was collected through self-report questionnaires. Data was analyzed using the SPSS program. RESULTS: In logistic regression analysis, the risk of being addicted to internet games was2.22 times higher in males than females. Adolescents with low and middle academic performance also had a higher risk(2.08 times and2.54 times) to become addicted to internet games. For the location of the computer, the risk of becoming addicted to internet games were .01 times lower in the living room or brother or sisters' room than in their own room. The risk of becoming addicted to internet games was 1.18 times higher in the higher usage time of internet games. The risk of becoming addicted to internet games was .49 times lower in the more accepting and autonomic parents' rearing attitude and .02 times lower in the high self-efficacy group than the low group. CONCLUSION: The result of this study suggests that there are noticeable relationships between internet game addiction and gender, academic performance, location of computer, usage time of internet games, parents' rearing attitude, and self efficacy.