The present study aims to identify the role of computer games and educational failure of highschool students of Tehran. The research method is correlational and survey data collection method has been used. The statistical population of the study includes 27535 Tehran’ s highschool students (Region 3). The sample size was estimated to be 385 by Cochran formula, selected by multi-staged cluster sampling method The data gathering tool was a researcher-made questionnaire. Face validity and content validity were confirmed by some experts and supervisors. In addition, its reliability based on Cronbach’ s alpha for social class was. 80, for Internet & game questionnaire was. 71 and for educational failure questionnaire was. 72. Data were analyzed by SPSS software, quantitative and descriptive statistics, multiple Pearson correlation test, T-test, and One Way Analysis of Variance. The results show that 88% of students have access to the Internet. Their primary access means include mobile phones and the average use of the Internet is 4 hours and 23 minutes. 41% play computer games, 65% use mobile phones and 17% use PlayStation to play games. The daily average of playing computer games is 2 hours and 55 minutes. From among the games, war games have been allocated the highest frequency. The results showed that there is a significant relationship between computer games, types of computer games, Internet access, gender, age, major, social class and educational failure of students.