The purpose of this paper is to show the therapeutic effect of Moreno's psychodrama on abandonment anxiety in an adult woman. Abandonment anxiety is anxiety caused by fear of losing the object's love or being abandoned, arises from the initial object relation and leads to a pathological relation pattern. Moreno's psychodrama is worth applying to the treatment of abandonment anxiety in that it directly deals with the pathology of relationships based on the 'psychopathology of inter personal relations'. The subject of the research was G, an woman job seeker in her early twenties, who struggled with being dragged, betrayed, and treated coldly in friends, lovers, and family relations, and was afraid of being abandoned by all of them. The research method is used Moreno's psychodrama treatment, 9 sessions are conducted, and the K IIP Korean interpersonal test, which was found to be highly correlated with abandonment anxiety, was used as a measurement tool. The analysis method is comparing the pre and post results of the K IIP Korean interpersonal test, and as a result, G was stably averaged across all measures of interpersonal relation in the post test. In addition, during the treatment process, G realized that she was anxious that she would be abandoned, began to count the other person's position and objectify herself, and showed a further growth, saying that she learned to express her hidden mind truthfully for fear of moving away from the other person. In conclusion, Moreno's psychodrama treatment for abandonment anxiety in an adult woman G showed a positive effect.