In this study, it was aimed to analyze the trends of theses carried out on problem solving, which is a common subject of study in Physics and Mathematics Education. After the year 2000, the thesis conducted in 32 physics education and 312 mathematics education were analyzed according to the type, year of publication, method used, variables used, participant/sample level, subject considered. It was determined that problem-solving theses are more involved in mathematics education, most theses are at the master's level, and usually the experimental method is used. The effect of a teaching method, strategy teaching, or problem-solving activities on students' problem-solving skills, performance, and attitude to problem solving were investigated. It was determined that theses related to problem solving in physics education are mostly completed in mechanics, while those in mathematics education are mostly completed in numbers and algebra learning. While there was a variety of theses in mathematics education as a sample level, theses in physics education were studied with students at the high school and undergraduate levels. It is important to present information about researches conducted in a particular field at different time intervals in terms of demonstrating the accumulation in that field of study. Because researchers are expected to update, change the information in the literature or add different information to the literature than existing information.