The aim of this study is to determine the effect of performing mizaj-based education on couples’ sexual satisfaction. This is a Randomized Controlled Trial study. 30 couples attending to healthcare centers of Sari city, with reproductive age, at least one year get married, live with their spouse and have sexual dissatisfaction, if they wish to participate in the study, they are randomly divided into control (15 couples) and intervention groups (15 couples). The samples will not be deleted but it will be done by intention-to-treat method. Sessions will be held in groups. The study questionnaire include of demographic information, GHQ, Larson , check table the positive and negative stimuli identification impact on sexual satisfaction. At baseline, participant in both groups will complete questionnaires. Then couples in intervention group participate in 4 training 120 minute sessions once a week. The assessment of sexual satisfaction in two groups will be conducted during the zero stage and 4 weeks and 3 months after starting the study. The person assessing the outcome, about the group that belongs the participant in it, is blind. In order to ethical considerations, at the end of sampling, a session of health education will be held and the educational booklet will be presented to the couples in control group.