This study was conducted to determine the effects of nurses' emotional eating behaviour and burnout levels on job performance. The population of this descriptive and cross-sectional study covered 750 nurses working in İstanbul Haseki Training and Research Hospital, and the sample included 255 nurses. The data were collected between 15.08.2023 and 15.11.2023 using the 'Personal Information Form', 'Maslach Burnout Inventory', 'Emotional Eater Questionnaire', and 'Job Performance Scale'. The mean scores of the Maslach Burnout Inventory and Emotional Eater Questionnaire of the participant nurses who had been working for 1-5 years, who were dissatisfied with their work and who worked in intensive care were found significantly higher. A positive relationship was found between the Job Performance Scale, the Maslach Burnout Inventory and the Emotional Eater Questionnaire. Based on the obtained data, it was concluded that nurses experience burnout and exhibit emotional eating behaviour. Therefore, it is recommended to support nurses in managing burnout and stress, plan training sessions, and, if necessary, provide psychiatric support. Processes in the work environment can negatively affect nurses emotionally and physically, which is reflected in job performance and patient care. Burnout affects not only job performance but also emotional eating.