Gestational Diabetes is one of the most common medical complications during pregnancy. It is seen between the 24th and 28th weeks of pregnancy with the increase in insulin resistance in the second trimester and ends with the end of the birth process. Due to this feature, it is distinguished from Type 2 diabetes. This disease, which is seen for the necessary energy needs of the fetus and placenta, is defined as the diabetogenic effect of pregnancy. Laughter is a universal response to humorous stimuli that exists in our lives. Laughter yoga is holistic with breathing techniques. It is a form of yoga that utilizes the brain's inability to distinguish between real and fake laughter. Laughter yoga helps people cope with stressful times and helps the person control themselves by reducing negative cognitive reactions. In line with this information, the aim of the study was to determine the effect of laughter yoga applied to pregnant women with gestational diabetes on perceived stress and quality of life.