This article is about cliché functions in psycholinguistics. Advanced popularity and necessity of this scientific area are dictat-ed by practical demands. Science development today is to be interdisciplinary and open to new knowledge though preserve traditions. A. A. Leontiev as one of the first native researcher in the area considered that psycholinguistics is intriguing by its application area. It is related to mass communication organization, objective linguistic manipulations both on crowd and person. Cliché from psycholinguistic point of view is dual and complex phenomenon. The article presents cliché and hackneyed phrase definitions as well as differences. The research studies points of view of I. R. Galperin, S. I. Ozhegov, D. E. Rosental, M. A. Telenkova, Y. E. Prokhorov, I. A. Sternin on cliché and hackneyed phrase. The work has examples from The UN Charter in English and Russian to demonstrate both psycholinguistic functions: text forming and emotion creating. It is explained that speech patterns mostly possess negative and evaluating nature and how this nature impacts the psycholinguistic functions. The article describes peculiarity of cliché implementation in diplomatic correspondence where clichés are called to make easier the whole process of information perception and to raise effectiveness and quality of the information. The nature of speech patterns in business communication, forecited phrases lexical distinctions in English and Russian languages are shown. The research demonstrates examples of grammatical peculiarities of certain clichés and their custom way of translation.