What standard or principle should guide decisionmaking concerning the permissibility of allowing children to be organ donors? For a long time, it has been widely assumed that the best interest of the child is the appropriate standard. But recently, several critics have charged that this standard fails to give due weight to the interests of the family and the intimate relationships that the family makes possible.1,2 This article reviews and rejects both the best-interest standard (as it has been traditionally conceived) and the alternative standard recommended by the critics. I then propose a new standard to help parents, healthcare professionals, and judges decide when it is and is not permissible for children to serve as organ donors. This new standard modifies and broadens the best-interest standard to allow it to account adequately for the contribution that intimate relationships make to the well-being of children.