Different definitions of quality of health care were reviewed. These difinitions are considered to be the fulfillment of desired results in the health of individuals and overall population and some refer to the health definition itself and to the influences of the patient, family and health system. In our country the objectives of health care quality are implied in the definitions revised. Because of the importance given to the evaluation of quality for health policy definitions some methods of analysis for the structure, process, and results of the system are reported from the very beginning of their application. Factors which involve nursing care in the quality of health care are described taking into account that its representation at administrative levels of the Health Care System and its enhancement impels of promotes the development of nursing actions in the structure and process of the system related to the results.