Although various studies have dealt with gambling games so far, studies on the motives of the teenager’s gambling games are still very weak. Youths experiencing gambling games have various problems like psychiatric problems like learning problem and anxiety and depression, problem in their family and problems like increase of lie, etc. To establish a prediction and a measure of this problem fundamentally, the study on why the youth joins in these gambling games is needed. The factorial experiment and reliability analysis was done in order to investigate the validity of the questionnaire and reliability. This study also use Pearson Correlation Model and Linear Regression Analysis. Consequently, external factors such as school adaptation and parental monitoring can have a greater impact than internal factors in the motives of the teenager’s gambling games. This study will contribute to prevent youth from accessing the Internet gambling games and to solute the problem from it.