The notion of corruption is studied mainly by political sciences, by sociology, including the sociology of law, by economic sciences, history and anthropology. So it seems to be an interdisciplinary issue that opens one field to the achievements of another. However, according to the author of the article, legal definitions of corruption, also those developed by various fields of law, should not be directly applied for describing this issue in administrative law since they have been formulated to meet the needs of specific legal acts and their objectives. The article is an attempt to distinguish the basic characteristics of corruption so that they meet the needs of administrative law. In her article, the author does not analyse normative acts, but achievements of social and legal sciences, including those in the field of administrative law.