The quality of care is key to assess patient satisfaction; however, there are deficiencies in health centers and hospitals. Therefore, the objective of this article was to determine the relationship between the quality of nursing care and patient satisfaction in an emergency service. Method: quantitative approach study, non-experimental, cross-sectional and correlational design. The population included 500 patients and the sample 217. The survey was used to collect information, applying two validated questionnaires: "Nursing Care Quality Questionnaire" by Marcelo Mallqui and "Patient Satisfaction Questionnaire" SERVQUAL, with Kappa indices of 77.96% and 66.86%, and reliability measured with Cronbach's α of 0.89; 0.84 (expectations) and 0.80 (perception). The information was processed using Excel 2016 and SPSS v27. Spearman's correlation coefficient was applied to evaluate the relationsh...