The present systematic review synthesizes the evidence of the interaction of quality of life with trait mindfulness in the adult population. Following the PRISMA methodology, quantitative articles with primary results on the association between quality of life and mindfulness in adults aged 18 to 65 years, published between 1979 and 2022 in English and Spanish, were considered. Searches were carried out in Scopus, Web of Science, PubMed, and PsycNet. The risk of bias was assessed using a methodological rigor scoring tool. In the end, 10 articles that met the criteria showed that the mindfulness trait may improve the quality of life of adults in a moderate to high way, due to the process of acceptance and coping consciously, without judgments and reactions, minimizing negative effects such as stress. Additionally, challenges regarding the conceptualization, measurement, and inclusion of third variables were identified.