The admission of a child to an intensive care unit imposes an overload on parents, siblings and other family members. Stress is experienced by all, and it interferes in personal relationships and can lead to changes in family routines, by illness and by the environment of intensive care. Nurses who work with children know that providing support and information to parents is important, but they are still shy about considering the needs of grandparents, who also need support and need to be considered by professionals, since grandparents' Care has been increasingly present in Brazilian families. In our reality, there is still a small movement of researchers to approach the third generation of the family when a child is ill. Therefore, the objective of this study is to understand, from the perspective of the grandparents, the experience of having a grandchild hospitalized in a pediatric intensive care unit -PICU. This is a qualitative study that used the theoretical framework of Symbolic Interactionism and the assumptions of the Grounded Theory as a methodological framework. Nine grandparents of children hospitalized in a PICU of a school hospital of a University of the interior of São Paulo were interviewed. Data were collected through semistructured interviews. The interviews were recorded and transcribed in full right after their completion, and analyzed in a comparative and constant analises, as recommended by the Grounded Theory. Through the process of analysis, performed through the open and axial coding, it was possible to identify two phenomena: PERCEIVING THEMSELVES INVOLVED IN A STORM, which comprehend the intense and multiplied suffering experienced by the grandparents, and represents the demands of the grandparents in amid to the grandson's critical ill. The second, STRIVING TO BE AN ANCHOR FOR THE FAMILY, represents the grandparents' response at the first phenomenon, includes the role that the grandparents attribute to themselves, the support and stabilization of the family, as well as their movement to gather strengths and resources to give to do this role. Grandparents carry a burden during the grandchild's hospitalization experience, evidenced by their need to demonstrate strength, maintaining a supporting role and not sharing their own suffering with other family members, so as not to overwhelm others who are already suffering but, thus overload themselves. Suffer by an absence of external resources to atend their own demands, Which, when left unattended, threaten the role played. Professionals need to adopt the concept of child and family-centered care in its broadest way, including grandparents.