The purpose of this research was to investigate the Effectiveness of relationship enrichment program based on emotionally-focused approach on emotional safety and attachment behaviors on incompatible couples. The research method was a single case multiple line baseline experiment. using purposive sampling method, 3 incompatible couples from volunteer clients who referred to specialized family clinics were selected. incompatible couples participated in 8 two-hour sessions held weekly. The data collection tools were Revised Emotional Security Questionnaire (ISQ-R) and the Brief Accessibility, Responsiveness, and Engagement (BARE) scale. also, to analyze the data and evaluate the efficiency of the intervention, visual drawing methods (graphic analysis), diagnostic improvement and six indicators of ingram efficiency have been used. Findings from the study showed that relationship enrichment training based on emotion-oriented approach is effective and significant on increasing emotional safety and attachment behaviors of incompatible couples (P <0.5).