The research aimed to reveal through classification the graduate thesis written in the field of preschool education between the years of 2010-2018. This study was qualitative research, and the data were collected through the document examination method. The sampling for the research was determined with criterion sampling, a purposeful sampling strategy. Based on this, a total of 984 graduate thesis were examined with 787 master's thesis, 120 doctoral thesis, and 27 Medical/Dentistry thesis, that were written in the field of preschool education. In line with the specified criteria, the full texts of the thesis were recorded and studied based on the subheadings determined in the scope of the research. Frequency was utilized in the analysis of the data. It was determined as a result of the research that there was an increase in the number of graduate thesis in 2015 and afterwards and that this increase was especially prevalent in the master's field. The research determined that, with regard to types of research, a quantitative research method and experimental and survey research models were used more frequently. According to the results of the research, it is recommended that research groups aimed at the field of preschool education in Turkey be diversified and that different research models be used.