Orderliness of style, ideal of eternal, harmonic beauty, canons of writer's proper and elegant expression and representation of reality and personal, inner experiences in tune with aesthetic principles of traditional literary structures. These were always almost the most important requirements upon which certain literary work is based on. However, during the emergence of avant-garde and its understanding of art, the role and value of aesthetic idealisation became things of the past, I. E. a false beauty represents inauthenticity and false artistic engagement that has no value and originality by itself. The true avant-gardiste par excellence, Janko Polić Kamov has, knowingly or unknowingly, cherished and strongly stood for avant-gardistic denial of contemporary literary forms (poetics of impugnment), as well as the quest for new expressions and conceptions of literature that will base its ideas on deconstructing the hierarchy of values and tearing down of aesthetic norms (aesthetic of ugliness). Therefore, this thesis will try to conduct a detailed analysis of Kamov's literary work. His work gained its place in Croatian literature through breaking off with poetics of Antun Gustav Matoš and other writers of Croatian modernism. A special attention shall be given to Kamov's literary experiment, i.e. his writing methods by which he has acheived stylistic and thematic destructions of commonly accepted literary forms. In other words, all elements of Kamov's aesthetic of ugliness will be presented, elements that occured in the creating of his peculiar lyric poetry, permeated with absurdity and crudeness. Besides the poetic expression, his interpretation of night, along with characteristics of his empty creation, farsity and grotesqueness (components of his narrative discourse) shall also be presented.