Introduction: The family member who assumed full responsibility of the child's needs in the Mother Kangaroo Program as the primary caregiver experienced a disenfranchised grief when the child died. The expression of bereavement is limited by himself, the family and society, including the health sector; since the death of the infant is not openly recognized or supported despite being a sad and unexpected event. In this sense, nursing care during the child's hospitalization, death, and the bereavement process at home doesn't always respond to primary caregiver needs and expectations. Objective: To describe the primary caregiver's experiences regarding nursing care in the face of the child's death in the Kangaroo Mother Program in Bogotá (Colombia), 2019. Design: Qualitative research using a descriptive phenomenological approach. The data were collected through in-depth interviews with six primary caregivers. The interviews were recorded, transcribed verbatim, and later analyzed manually using Colaizzi’s method. Outcomes: The primary caregiver's experience is described in the main category Protecting and Transforming the Caregiver-Child Bond: A Challenge for Bereavement Nursing Care. Five themes expressed this phenomenon: Playing the caregiver role in the unit was complex; facing death was shocking; coping with absence was painful; preserving memory was necessary; and learning from the bereavement process was moving forward. Conclusion: The primary caregiver's experience regarding nursing care in the face of the child's death in the Mother Kangaroo Program is described as the need for nursing care not only for the childbut also for the caregiver. In addition, caregivers express a need for nursing care participation from the hospitalization period to the moment of death, and even to the bereavement process at home. Nursing care when a child's death in the P.M.C. can be improved by focusing on the primary caregiver's expectations and needs. The primary caregiver's experience shares common elements despite being a unique and personal experience.