The study of phenomena that have the potential for verbal persuasive influence on the recipient as well as the identification and development of ways to counteract this influence are the challenges of modern linguistics. Poetry is considered to be one of the most ancient forms of verbal communication. The analysis of the nature of poetic text units provides the key not only to a deeper interpretation of the idea of a particular work but also to the explanation of general linguistic phenomena. The poetic discourse as a linguistic and creative environment regularly activates expressive and figurative potential of language units at different levels. Describing the processes of the grammatical level of poetic language, the terms “fascination” and “fascinativity” are often used. In this paper, the authors refer to the theoretical contributions of representatives of the Kharkiv School of Philology and scholars of other linguistic branches whose works are related to the issues of perception and apperception, and fascinativity of texts. Fascination is considered as an aspect of social communication complementary to information, and fascinativity as an ontological feature of a poetic text that is closely connected with the realisation of the author's supertask. Fascinativity is a basic notion, considered as a specific quality of the text – the ability to “enchant” the reader. Fascinativity is created by the author with the help of linguistic and discursive (in this case, poetic) means and affects the perception of poetry by the recipient. The research findings emphasise that the degree of fascinativity is strongly affected by all the immanent elements of a particular poetic text, the existing discursive practice, and tradition. The study of fascinativity features in a poetic text and fascination as an important aspect of social communication becomes convincing when scholars draw on recent research findings of modern linguists in the field of linguistic poetics. Combination of the communicative and linguistic poetics approaches allows to explain how the mechanism of fascination works in terms of communication and how the fascinativity of a poetic text and discourse is formed.