Background: One of the most important determinants of health and marital satisfaction, the family and religious adherence can be effective because religion includes guidelines for life and providing a system of beliefs and values make these features can affect family life.

Approach: This descriptive research – an analysis performed to assess the level of satisfaction of 47 questionnaires marital satisfaction questionnaire whose validity and reliability were evaluated and a couple of them asked to assess adherence to religion. The study population included 382 couples in Tehran that a cluster of 22 districts of Tehran were the selected. To analyze the data, ANOVA, Chi-square, and Pearson correlation coefficient using the software SPSS (version 22) became all tests were performed at the 5% level.

Results: The data showed that the average age is 34 for women and 38 years for men and the majority of couples are in appropriate level in religiosity (40.5 percent). The results showed a main direct relation among religiosity and marital satisfaction of men and women (p ≤ 0.001). The correlation among religiosity and marital satisfaction of women r = 0.271 and this factor in men r = 0.200 was obtained indicating a direct relationship was significant.

Conclusion: couples who were both committed to religion, their marital satisfaction score was more than couples without adherence to religion, and thus promoting religious beliefs and commitment can increase their marital satisfaction in couples.