The present study was conducted to investigate the effectiveness of rational- emotive behavioral therapy on emotional expression and family resilience in couples on the verge of divorce. The present research method was semi-experimental with a pre-test-post-test design with a control group and a two-month follow-up period. The statistical population of the present study included the couples on the verge of divorce who referred to consultation centers in zone One of Tehran in the Fall of 2023. 17 couples (34 people) were selected through purposive sampling method and randomly accommodated into experimental and control groups (9 couples in the experimental group and 8 in the control group). The experimental group received rational- emotive behavioral therapy (14 sessions) during fourteen weeks. The applied questionnaires in this study included Marital Conflict Questionnaire (MCQ), Emotional Expression Questionnaire (EEQ) and Family Resilience Questionnaire (FRQ). The data taken from the study were analyzed through mixed ANOVA and Bonferroni follow-up test via SPSS23 software. The results showed that rational- emotive behavioral therapy is effective on the emotional expression (F=52.47; Eta=0.62; P<0.001) and family resilience (F=37.23; Eta=0.54; p<0.001) of the Couples on the Verge of Divorce. According to the findings of the present study, rational- emotive behavioral therapy can be used as an efficient approach to improve emotional expression and family resilience in couples on the verge of divorce through clarifying goals, classifying irrational thoughts, knowing the connection between emotions and behavior and adopting a life philosophy based on self-acceptance.