Мета дослідження - development of the conceptual theoretical criminological and legal basis of countering corruption, which includes creation of the unified system of scientific views on corruption and anticorruption activities and formulating on these grounds criminological and legal advice, aimed on making such activities more effective. Об'єкт дослідження - corruption as a social and legal phenomenon, its manifestations, tendencies, interaction of corruption and other social phenomena and processes. Предмет дослідження - theoretical and practical criminological and legal problems of countering corruption. Методологічна основа - methodological basis of thesis is the contemporary theory of scientific cognition of social phenomena, which includes a number of theoretical methods. The following methods were used in the research process: structural-functional analyses, historical legal, formal legal, comparative legal, statistical (observation, unification, grouping, analyses of figures), particular-sociological (questioning, research of criminal and administrative delinquency cases). Теоретичні результати та новизна - suggested theoretical provisions form a basis of legal theory and criminological study of countering corruption - concept of understanding corruption, its nature, types, mechanism, tendencies of its development in Ukraine, its background, principal ways and legal regulation of countering it. Практичні результати і новизна - the author developed fundamental provisions for forming an anticorruption state policy, choosing a strategy, basic ways of countering corruption and particular measures of improving anticorruption activities. The results of the thesis could by used in: a) scientific activities (as a methodological basis for researching problems of countering corruption or as a material for studies of other fundamental problems of countering corruption); b) legislative activities (in improving the anticorruption law); c) education (in teaching and studies of criminology, criminal law, legalsociology, administrative, constitutional law etc); d) activities, aimed on legal education of population (providing anticorruption education of population). Предмет і ступінь впровадження - the results of the research were used in a number of anticorruption laws and draft laws, including Law of Ukraine "On Fighting Corruption" , Concept of Fighting Corruption in 1998-2005, the Resolution of the Plenum of the Supreme Court of Ukraine of May, 25 1998