Background: The present study is applied in terms of purpose and descriptive-analytical in terms of method. This study was conducted with the purpose of the effectiveness of treatment schemas on reducing marital conflicts and increasing mental health.

Method: In this study, quasi-experimental method (pre-test, post-test with control group) has been used. The statistical population of this research is all students of Isfahan University of Technology, who were studying in 2018-2019. The sampling method in this study was random. The experimental group received schema therapy training in 8 sessions while the control group did not receive any trainings. Then in order to compare the results of the two groups, post-test was taken from both. The data collection tools were Goldberg Marital Conflict Questionnaire (MCQ) and Mental Health Questionnaire. In the present study, SPSS software was used to analyze the data obtained from the questionnaire and analysis of covariance test was used to test the research hypotheses.

Result: The findings showed that the training of treatment schemas has been effective in increasing the mental health of married students. Also, the results of analysis of covariance showed that with 95% confidence, it can be said that treatment schemas are effective in reducing marital conflicts of married students.

Conclusion: Schema therapy training is very important in reducing the mental health problems of couples with extramarital relationships. Queen Line et al. (2018) found in a study that schemas are structures that are formed based on reality or experience and mediate the behavioral responses of individuals.