The article deals with the semantic-syntactic relations of prepositional-case model phraseological units with the words in the sentence. The relevance of the research is specified by the fact that there is a lack of grammatical and semantic analysis of prepositional-case model phraseological units. The peculiar features of such units have not been taken into consideration to the full. The aim of the research is consider semantic-syntactic properties of prepositional-case model phraseological units. The task of the research is to define the supporting words of the analysed phraseological units in the proper context. The case form of the word in such construction can be: the noun, the pronoun, the substantivised adjective, the numeral. It is established that prepositional-case model phraseological units can have several supporting words depending on the context. The perspectives of the work consist in necessity of further research of given phraseological units, in analyzing their peculiarities.