The author, on the occasion of the tenth anniversary of most recent reforms of administrative judiciary in the Czech Republic and the Republic of Poland, compares the legislation of Czech and Polish administrative judiciary. The article is divided into three parts, the first two discuss the legislation in both countries. Constitutional foundations of the organization and the system of administrative judiciary are addressed there. Subsequently, the author deals separately with the legislation of lower levels of the system and the legislation of supreme administrative courts, focussing on judges and other professional staff and the structure of the courts. Both the parts are rounded by an interpretation of the instruments for unification of the judicature. The third part of the paper includes the final summary.