The present paper was conducted with the aim of determining the role of strategies of maintaining relationship, the relationship of problem-solving and belief in the holiness of marriage in marriage happiness, and examining the mediator role of communicative variables. To this end, a sample including 358 married individuals in Marivan were selected from available population. Research tools include family problem solving communication index, the scale of the holiness of marriage, family communication scale, and marriage happiness scale. The hypotheses were examined by using one way variance analysis and path analysis. The results show that belief in the holiness of marriage results in more use of positivistic strategies, openness and being easy, giving confidence, social networks, division of responsibilities, advising and management of conflict, and promotes affirmative relationship and decreases conflicting relationship. Furthermore, the mediator role of strategies of maintaining relationship and problem solving was confirmed. Therefore, it can be said that individuals' belief in the holiness of marriage is a useful cognitive belief which can make marriage a safe environment for growth and proliferation.