The purpose of this study is to identify research trends in theses for master s and doctorate degrees during the domestic play therapy case study from 2011 to 2019 to form the basis for the design of effective play treatment programs in the future. To this end, 82 papers on domestic play therapy cases, such as master s and doctorate degrees, were analyzed using the publication year, target, research subject, and play therapy approach. As a suggestion for future research, it is necessary to expand and implement the scope from the initial study of play therapy to the latest study, and second, to expand the research field including academic journals, and third, to address annual age, characteristics, research topics and approaches in general. Fourth, it is necessary to analyze overseas research trends, and fifth, to develop effective play therapy programs for certain types of clients.