O Online game is a consolation and the favorite game of all ages. It has a negative and positive impact. This study was made to understand about the impact of playing online game on children and to explore the relationship between playing action online game and academic achievement in primary male student grade 4-6. A cross-sectional study was conducted that participating 143 male students of 2 primary school with 122 sample. Data collection was by questionnaire-based interviews, covering age, intensity of playing game, type of the game, and odd semester mark from report cards. Data analysis was performed using SPSS for Windows release 16.0 and level of signification was less than 0,05. The dominant intensity of playing game was ≤2 hours (80.3%), the mark was dominant by good mark (80.3%), the dominant type of game was action game(58.2%). There is no relationship between intensity of playing game and academic achievement (p=0.464), and there is also no relationship between type of the game and academic achievement (p=0.655). There is no relationship between intensity of playing, type of the game, with academic achievement.