This study aimed to investigate the impact of transactional analysis training on parent-child conflicts among male high school students. This quasi-experimental research had a pretest-posttest control group design. The statistical population of the study was comprised of all male first graders of high school in Central Marhamat Abad district, West Azerbaijan Province, in school year 2014-15. The sample of the study consisted of 30 pupils who had the most intense conflict with their parents. These students were randomly divided into two subgroups of experimental and control.  Using the Conflict Tactics Scale for Parent and Child (Straus, 1990), both subgroups were asked about the quality of their parent-child relationship before and after the experimental group going through an eight-session course on transactional analysis. Covariance analyses of the data revealed a significant difference between the two groups indicating the effectiveness of transactional analysis training in reducing parent-child conflicts and the two components of verbal and physical violence. Moreover, TA promotes verbal reasoning component among male students (P<0.001).