This chapter is devoted to outlining the research literature of psychodrama and group therapy. Evidence-based practice trends and their impact on practice in the field of social work are described. Psychodrama is also framed within the research bases of the humanistic-experiential psychotherapies, creative arts therapies, and body- and movement-oriented therapies. While the quality and quantity of research available on the effectiveness of psychodrama are limited, current findings support its use to as a treatment for various mental health conditions. Shortcomings and critiques of research in psychodrama are included while indicating a need for higher quality psychodrama research studies. The research history of psychodrama’s founder, Jacob Moreno, is also described to provide insight on psychodrama’s historical relationship to research.