The idea of the title that the juvenile court is the greatest conqueror of legal history comes from a work by renowned criminal lawyer Ferenc Finkey, who quoted Hastings H. Hart’s thoughts about the juvenile court. The Juvenile Court first appeared in Illinois, USA, in 1899, followed by most federal states and several countries on the old continent. The state-and legal life of Hungary, in the broader context of the Central and Eastern European states, is usually interpreted in the framework of the centre-periphery model. Without going into the issue of regulatory delay, it is worth noting that Hungarian legislation caught up with pioneering states with special criminal law regulations introduced in the early 20^th century to establish the foundations for other treatment of juvenile offenders. The different treatment in this context refers to different rules from those for adult offenders. The law regulating the juvenile court as a special court entered into force in 1914, supplementing the substantive criminal law provisions with procedural rules.