This study examined the association between self-reports of family rituals and relationship attachment, relationship quality, and closeness in 150 married couples in Portugal. Using structural equation modeling to examine both within-individual and across-partner effects, the results were generally as predicted. First, lower levels of avoidant attachment were related to greater family investment in rituals. Second, greater family investment in rituals was associated with more positive relationship quality and closeness. Third, family investment in rituals partially mediated the link between avoidance and relationship quality and closeness. Fourth, the mediational models were significant for women but not for men. These results highlight the importance of links among family interactions, couple interactions, and individual differences.