Introduction: Couples adjustment is one of the important aspects of adjustment in marital life. It refers to a situation in which wife and husband feel satisfied due to being with each other. Present research aimed to investigate the relationship between irrational beliefs and marital adjustment of couples in Esfahan City.

Method: Among couples who had referred to a counseling clinic in Esfahan, 62 couples were selected in convenience. They answered to Dyadic Adjustment Scale (Spanier, 1976) and Irrational Beliefs Test (Jones, 1986). 

Results: Pearson correlation coefficient showed that there was a significant and negative correlation among dyadic adjustment with cognitive components such as: need for others’ approval (-0.24), high self-expectation (-0.14), tendency to blame (-0.11), reaction to deprivation (-0.21), emotional irresponsibility (-0.13), high concern along with anxiety (-0.22), avoiding from problems (-0.11), helplessness towards change (-0.10), dependency (-0.25), and perfectionism (-0.18) respectively.

Discussion: Analysis of regression showed that cognitive components can explain %25 of variation in dyadic adjustment. Findings emphasize on the importance of consultant programs before marriage. Also, the findings will be beneficial for training consultants in clinical centers. In addition, such programs preserve mental health of couples and their lives permanently besides of saving therapeutic costs.