ABSTRACT Objective: to analyze the Theory of Chronic Sorrow, following the model of analysis and evaluation of Nursing theories proposed by Jacqueline Fawcett. Method: a reflective study, developed through the investigation of the Theory of Chronic Sorrow and its application in the nursing practice. The sample consisted of eighteen studies that used the theory as a reference. A Model for Analysis and Evaluation of Nursing Theories was used, which involved, in the first stage, a detailed examination of the referred theory in terms of scope, context and content. In the second stage - evaluation - the criteria of clarity, significance, internal consistency, parsimony, testability, empirical adequacy and pragmatic adequacy were used. Result: This is a mid-range theory that is predictive in relation to the scope. As for the context, it is based on the stress and adaptation model. The content presents well-defined and interrelated concepts. The concepts of meta-paradigm have significance, internal consistency and are operable. It features a usable instrument: The Chronic Sorrow Questionnaire, reliable as a tracking tool to detect the presence of chronic sorrow. The theory is parsimonious, it can be used with chronic diseases and directed to people in the final phase of life and their family caregivers. Conclusion: this study may contribute to indicate the use of the Theory of Chronic Sorrow and support nursing care in promoting effective strategies and, consequently, improve the comfort of patients and their families in coping with chronic sorrow.