Breastfeeding (BF) is an essential part of the comprehensive care nurses provide in the Neonatal Care Unit (NCU). Due to the workload and delegation of different care activities, the dynamics in these units focus on innovation using technology and postpone humanization of service, undermining BF support. To design a BF support program at NCU. Qualitative participatory action research. Seven semi-structured interviews were conducted with health professionals with expertise in BF. Some of them worked in NCU of the health facility where the study was conducted; others were external. Their experience and knowledge were used to identify the key elements for designing a BF support program at the UCN. They are presented in the following categories: a) breastfeeding culture, including institutional policy on breastfeeding and standardization of the process; b) quality, including registration and control of activities; and c) monitoring of indicators and continuous auditing. A BF program has been designed and it will be implemented by the health facility to prevent the interruption of exclusive BF through support, training, standardization, and promotion. Nurses are interested in standardizing a program that allows them to provide patients with truthful and concise information, and they view education as a fundamental pillar in the development of a successful BF program.