The aim of this study is to study the effectiveness of emotion-focused therapy on decreasing clinical symptoms in sexual female victims of affective relationships. Sexual victims in affective relationships are girls who have had complete sexual relationship have been proposed by boys threatening girls to end affective relationship unless accept it. Therefore girls have accepted this sexual relationship to maintain the affective relationship. However boys end the relationship after sexual relationship. In fact, after ending the relationship, these girls suffered from being victims and have shown Post-traumatic Stress Disorder symptoms. Present study is an experimental single case method and a multiple baseline design. Sample includes three cases girls and they are selected based on purposive sampling method. This treatment is done based on Greenberg’s et al manual of emotion focused therapy. The main aim of this treatment is to help people to clarify their feelings and needs, because people gain more acceptances for what is emotionally important for them in this way. So this research contains a baseline evaluation session, a treatment phase, and a 3-month follow up phase. The treatment contains 12 therapeutic sessions per a week (each session 45 minutes) based on this manual. In this study, Mississippi Post-Traumatic Stress Disorder Scale, Rosenberg Self-esteem, Beck Anxiety Inventory (BDI), Beck Anxiety Inventory (BAI), and Ruminative Response Scale (RRS) are used. And clinical significance and recovery percentage index are used for data analysis. When people’s scores decrease to less than cut off score, the results are clinically significant. Recovery percentage formula is a way to evaluate client’s progress in decreasing the problems and more than 50% recovery in results, is considered clinically significant.