This study was conducted to see the effect of the group play therapy on challenges and difficulties that pre-play therapists face using some theatrical factors. For this study, six graduate students, pre-play therapists, in child psychology faculty who have never gotten hands-on experience were randomly selected. Through precedent research, group play therapy program consisted with theatrical factors of drama therapy. Group play therapy program was carefully composed with theatrical factors that are being used in drama therapy. The contents of this program was confirmed and verified by a play therapy expert. The program consists of 10 sessions, twice a week for 50 minutes. To prove the effectiveness of the group play therapy using theatrical factors, the behaviour changes of the participants were analyzed. Also, utilizing the play-drama continuum concept, changes in each development stage were observed. The results of applying group play therapy on pre-play therapists, the participants were enhanced in expressing both verbal/non-verbal emotions and the ability of self-expression. Also, it was observed that the challenges that pre-play therapists experience in dramatic reality were being handled safely. In addition, the play-drama continuum concept helped the participants to horizontally advance in development stages. Since this study was conducted observing a single case in a short period of time, it is limiting to generalize the effect. However, the goal of this study was using various mediums to compose a group play program to support pre-play therapists’ to overcome struggles and challenges.