Abstract
This paper deals with prepositions with causal meaning in Russian and Czech. In Slavic languages prepositions are closely connected to cases. Russian and Czech prepositions have many common features. Prepositions show a relation in space or time or a special relationship between two or more people, places, things or situations. In the current paper we are dealing with causal relations. There are different ways to express them. Among these means, the most common are prepositional-case forms and complex sentences with a subordinate causal part. We analyze the repertoire of causal prepositions in both languages and describe their statistical representation in corpora. Another task is to reveal translation equivalents between two languages.