Purpose: The purpose of this study was to investigate personal, family, and community factors that affect gambling behavior of high school students. Methods: The participants were 564 students from 7 high schools. Data were obtained from these participants between July 6 and July 20, 2011 by using self-report questionnaires. The data were analyzed using the PASW 18.0 program. Results: Of the participants, 88.8% were in the non-gambling group, 11.2% in the risk for gambling group. Significant factors related to gambling behavior were 7 personal factors: alcohol consumption, suicidal ideation, experience of being a runway, irrational gambling beliefs, risk taking, stress, and self-control; 4 family factors: parental alcohol abuse, mother who gamble, sibling who gamble, and parental monitoring; and 2 community factors: peer who gamble and number of gambling peer. Conclusion: The outcomes of this study indicate that in order to decrease high school students` gambling behavior, it is necessary to design intervention programs that managing personal, family, and community factors of gambling behavior.