There were three actors, the protagonist (the patient), the director who cures him and controls the play, an the analyst who aids the protagonist in expressing and acting out his feelings.
心理劇通常由三人扮演。一是主角（患者），也就是要面對自己的人；二是導演（治療者）是掌握全劇的人；三是分析師，他可以幫主角說出或演出心中的反應，也稱「輔助我」。