The present study was conducted with the aim of investigating the causal model of the relationship between cognitive regulation of emotion and the quality of committed relationships of couples with the mediation of mindfulness. The design of the present research was a correlational description. The statistical population of the present study included married women in Bandar Ganaveh in 2022, of which 263 were selected by Convenience sampling sampling. The data collection tools in the present study included Cognitive Emotional Regulation Questionnaire (CERQ), Marital Commitment Questionnaire (DCI) and Freiburg Mind-Awareness Questionnaire-Short Form (FMI) which were completed online. Structural equation modeling method were used to check the hypotheses using SPSS22 and Smart PLS3 software. The obtained findings indicated that the research data has a good fit with the proposed model. The results of data analysis showed that the cognitive regulation of emotion has a positive and direct effect on the quality of committed relationships of couples (p<0.05). Also, there is a positive and direct effect mindfulness and the quality of committed relationships of couples (p<0.05). There is an indirect and effect the cognitive regulation of emotion through mindfulness on the quality of committed relationships of couples (p<0.05). We conclude from this research that; Strengthening the cognitive regulation skills of emotion and mindfulness is related to more committed relationships in married women, and counselors of counseling centers can benefit from the results of this research.