This chapter discusses the procedural capacity of a child in administrative procedures in Slovenia and Croatia. Both countries were formerly part of a Yugoslav state and have a common tradition of administrative procedure. Since independence, each country has addressed the challenges of administrative procedure in its own way. The chapter begins by examining international legal instruments that ensure children’s active participation in an administrative procedure through the right to be heard and to express their opinions. It then presents the regulation of the procedural capacity of a child and the child’s legal representation in an administrative procedure in Slovenia and Croatia. The possibility of consulting and expressing the child’s views in administrative procedures in Slovenia and Croatia is also analysed.