Kinship foster care has experienced significant growth within the Spanish child protection system and now carries considerable weight. Over 40% of children in the public care system are formally fostered by relatives, equalling, and in some areas exceeding, the percentage of those in residential homes. This increase is not the result of a pre‐designed global programme or clearly pre‐established objectives in the system itself. Its current weight within the system has made it the focus of attention of researchers, politicians and protection system practitioners alike. The results of research carried out in Spain have revealed more positives than negatives in this type of fostering, giving rise to an in‐depth reflection on care systems, questioning the determinism of theories anchored in the intergenerational repetition of abuse and making room for perspectives more associated with resilience and children's rights. Positive results are related to fewer breakdowns, more stability, permanency beyond the age of 18, children agreeing with their placement, academic results similar to those with non‐relatives and better results after leaving care. The negatives relate to the lack of economic, educational and psychosocial support, which generally goes with this type of fostering. The experience of support programmes for these placements contributes to the debate.