The purpose of this study was to examine the concept of stepchild claiming stepparents as parental figures or as kin. By examining the process of stepchildren claiming stepparents’ as kin, we sought to explore the properties of the concept of stepchild claiming. From in-depth interviews of 26 stepchildren, we proposed a conceptual analysis of stepchild claiming, identifying eight properties of stepchildren claiming stepparents as kin/parents: degree of claiming (identity conviction), degree of intentionality, timing in life, mindfulness/awareness of others, naming, seeking public recognition, using biological parents as benchmarks, and identifying with the stepparent. The results of this study contribute to an understanding of constructed kinship relationships in diverse families.