The article is devoted to the problem of childparental adaptation in foster families, which is described through the childs position. The author compares the way the Family phenomenon is understood by children from three groups: children, who live in the orphanage; children, living in blood foster family and children, having a new foster family. The theoretical analysis enables to single out the criterion of the childs adaptation to the new family. While making the content analysis and comparative analysis the author comes to the conclusion that the children, adapted to their foster family, have clear and positive understanding of mother and father image; they also positively characterize themselves as family members, understand their role and functions in their foster family, associate their future with their foster family, understand the value of harmonic child-parental relationships; they are aware of the significance of mutual support and acceptance. The author formulates the recommendations for psychological support service specialists on the parents and childs preparation for living together.