This research proceeds to investigate the effect of group training based on logotherapy on post-disorder stress of couples infidelity in Izeh city. It has been conducted in three stages: pre-test, post-test and follow-up. The sampling method is randomly available in this research, and 20 persons referred to the Mehr Gostar counseling center from the justice by title of divorce requests, both couples were invited to participate in this study and were randomly divided into two groups of 10 experimental and 10 evidence. In this study, the questionnaire of post-disorder stress in 1997 by Noris and Reid is used to measure variables. Descriptive statistics and covariance analysis method are used for data illative analysis. The results of the hypothesis test showed that there is a meaningful relationship between group treatment based on logotherapy on the reduction of post-disorder stress.
