This contribution is focused on constituent negation and ways of its expressing in contemporary Czech, or more precisely in Czech National Corpus (SYN2005) and Prague Dependency Treebank (version 2.0). In most of the Czech linguistic handbooks, constituent negation was treated as such a negation that is not a part of verb.
The author offers a new primarily semantic definition of constituent negation in Czech, based on data research and study of relevant literature concerning syntactic negation. Further, the author explores the possibility to express the findings on the tectogrammatical level of PDT.