Purpose: The purpose of this study was to describe the essential structure of the lived experience of aggressive elderly women’s anger. Methods: Seven elderly women with aggressive tendency were interviewed. Colaizzi analysis of phenomenological research was applied. Results: The meaning of experiences were identified as four categories from eight theme clusters and fourteen themes. The four categories were ‘Lamenting over life that has been disrespected’, ‘Uncontrollable and deep resentment’, ‘Rationalization for anger’, ‘Embers of the fire that have never been extinguished’. Conclusion: The findings of this study reveal a close similarity between the anger of older women and the anger of different age groups. However, this study is significant because the data came from an in-depth examination of aggressive older women's anger vented in the Korean social-cultural context, offering ample understanding of this anger. The results of this study can be used to develop diverse physical, psychological and social programs to help older women control and relieve their anger and have a healthier lifestyle.