Objective: The study was conducted to examine the postgraduate nursing theses on the effects of laughter therapy/yoga on physical and mental health in Turkey. Materials and Method: The study was planned in a qualitative research design and document analysis was used as the data collection method. The study was conducted between 01.07.2023 and 15.07.2023, using the keywords "laughter therapy", "laughter yoga", in the "YOK National Thesis Center" database without any year limitation. The "Thesis Evaluation Form" prepared by the researcher was used for data collection. Descriptive statistics were used to evaluate the data. Results: As a result of the search, 13 theses were reached between 2016 and 2023 and it was determined that 7 of the theses were doctoral theses and 6 were master's theses. It was determined that most of the theses were conducted in 2022, 61.55% of them were conducted in the Department of Nursing, and the majority of them (n=9) were randomized controlled type. At the end of the study, laughter therapy/yoga was found to be effective in reducing pain, depression, fatigue, frequency of mental symptoms, stress and anxiety, and increasing psychological well-being, sleep quality, general health status and quality of life in individuals. Conclusion: As a result of our study, it was determined that laughter therapy/yoga can be evaluated as a suitable approach for nurses to improve the physical and mental health of individuals and its effectiveness can be tested. Laughter therapy/yoga is recommended as a drug-free, simple and inexpensive treatment method that can be used in nursing care.