In this study, the difficulties experienced by grandparents actively raising their grandchildren were examined in the field, and the characteristics of their experience raising grandchildren were qualitatively analyzed. For this study, we interviewed five grandmothers or grandfathers raising elementary school-age grandchildren for more than two years in the Chungcheongnam-do region. Through a phenomenological study, the themes and meanings of parenting experiences that emerged in the process of grandparents actively raising their grandchildren were revealed in detail. As a result of the analysis, the experience of grandparents actively raising their grandchildren is largely divided into two categories: ‘care experience’ and ‘internal experience’. Three themes were derived from the ‘care experience’ revealed in the grandparents’ experience: ‘care related to food, clothing, and shelter,’ ‘growth care,’ and ‘time management guidance.’ Three themes were derived from the ‘internal experience’ of grandparents in the study: ‘feelings toward grandchildren and children (parents of grandchildren),’ ‘feelings toward oneself,’ and ‘will and reward for raising grandchildren.’