The article is devoted to the analysis of the image of a window and its functions in the prose works of S. Krzhizhanovsky. The relevance of the study is driven by the important role of this image in modeling the artistic space of the text, in the development of the plot and in creating the character of the hero, in revealing the philosophical and aesthetic problems that determine the uniqueness of the writer’s works. The article demonstrates that the window becomes for the hero not only an “insurmountable boundary” that does not allow him to leave the “minus” space saturated with trouble, as V.N. Toporov wrote about. Cases where the use of this image performs the function of expanding space and creating ecphrasis are considered. It is shown that the success of overcoming the window boundary is due to the genre features of Krzhizhanovsky’s works and the type of hero, which is different in the writer’s short stories and essays. It is demonstrated that Krzhizhanovsky’s window not only models space, but also expands artistic time (“Memories of the Future”). The article also analyzes examples of metaphorization of an image and explores its world-modeling function, which shapes the character and personality of the character and generates the plot of the work. The image of a window in Krzhizhanovsky is considered in the context of intertextual connections with literature of the 19th-20th centuries.