Abstract: Introduction: In recent years, the quality of life of medical students has been questioned, given the context in which they are inserted. Stress as a result of the number of long hours, difficulty in reconciling academic and personal life, exposure to situations of pain and suffering, have been shown to be the main factors for the decrease in quality of life of these students. The aim of this study was to assess the quality of life of medical students and its associated factors. Method: Cross-sectional study with 419 medical students from a public institution in Goiás. The study was carried out with students over 18 years old and enrolled in the second to the eighth semester of medical school, between 2017 and 2018. Sociodemographic and lifestyle questionnaires and the World Health Organization Questionnaire for Quality of Life - Brief Form (WHOQOL-BREF) were used. Results: The factors related to low quality of life were: female gender, the use of stimulants, thinking about giving up medical school and having comorbidities. Those related to a better quality of life were consuming fruits and vegetables, practicing physical activity, more sleeping time and stress management. Conclusion: This study found a set of factors capable of interfering with the quality of life of these students, suggesting the need for interventions aimed at pedagogical and psychological support.