This chapter concerns non-judicial review of administrative action, that is, review by bodies other than the judicial courts, including adjudication by the administration itself. It identifies in broad outline, and from a comparative perspective, the main attributes of administrative adjudication. These include: the variety and the origins of the bodies which carry out such review, the organization of internal and external administrative review, the principal structures of administrative tribunals and equivalent bodies, and their place in the justice system generally. A brief assessment of the perspectives for the study of administrative tribunals in the context of comparative administrative law is proffered by way of conclusion.