This paper describes the development of a relationship model for biobanks, He Tangata Kei Tua, that will enable best practice by addressing Māori ethical concerns. This model is intended to guide culturally informed policy and practice for biobanks in relation to governance, operational, and community engagement activities. The model is derived from key issues of relevance to Māori, which were identified by the Te Mata Ira research project conducted in 2012–2015. Te Mata Ira identified Māori perspectives on biobanking and genetic research, and together with tikanga Māori, it developed cultural guidelines for ethical biobanking and genetic research involving biospecimens. The model draws on a foundation of mātauranga (Indigenous knowledge) and tikanga Māori (Māori protocols and practices).