Background: Technology is growing very rapidly especially in this modern era. As technology develops, habits of children change. One of the developed technology that is consumed by most people now is video game. Video games are not only playable by adults but also children, which considered as the age group that play video games more. Video games can alter child behavior such as negative behavior and positive behavior. Purpose: This study aims to find out the description behavior of preschool age children who play video games in Tamantirto district. Research Method: This research uses descriptive quantitative. The sample in this study amounted to 183 respondents. The design of this research is using cross sectional approach. The sampling technique is using Stratified Random Sampling. Results: The average result of the research shows the description behavior of preschool children age 3 and 4 who play video games in Tamantirto is in wellbehaved result with the number of 183 respondents. From the result of the research, there are 130 respondents (71,0%) who is in well-behaved category, 34 respondents (18,6%) in neutral category and 19 respondents (10,4%) in less wellbehaved category. Conclusion: Most respondents are in well-behaved category of the description behavior of preschool age children who play video games in Tamantirto. Thus,