Islamic lifestyle is family-oriented, and stability of love in conjugal relationship is an important principle in family’s stability. For this reason, the present study has been conducted using the correlational method with the aim of researching into the role of order in couples’ relationships in the stability of conjugal love. The research instrument is a combination of Sternberg’s Triangular Love Scale (1989), and researcher-made questionnaire measuring order in couples’ relationships. The statistical population includes all married women and men in the city of Tehran, of which 384 individuals were selected based on Cochran formula and through multistage cluster sampling. The SPSS 26 Software was used to analyze the data. The results of multivariable regression showed that 59% of all the alterations in the stability of conjugal love are predicted by three out of four components of micro order, namely, congeniality, being likeminded, and being in step with one another. The component ‘having the same fortune’ has not had a role in predicting alterations in love. Therefore, to mitigate family problems, including divorce and infidelity, policy and plan makers and family counselors, can, in presenting their educational and medical plans, lay the ground for the stability of conjugal love through focusing on increasing couples’ being likeminded, being in step with one another, and congeniality, thereby helping the stability and excellence of family through increasing intimacy, libido, and commitment in the husband and wife relationship.