The study focuses on identifying the western motifs and syuzhets in Czech fiction of the 20th century set in the territory of the East Carpathians. The motif and space constants of the western in Czech prose of the 20th century written about this territory are not coincidental, arbitrary, on the contrary, their presence is logically related to the semiotic status of the East Carpathian border region, i.e. the established image of this geographical area in Central European cultures. The motif invariants of the western as a genre and of the East Carpathian border region overlap, e.g. both of the invariants feature the border as a phenomenon, the conflict between the archaic and the modern and the conflict between the local and the strange. The Czech prose of the 20th century reflects on this territory by means of two essential patterns, that of the western (conservative-patriotic) and that of the eastern (socially conscious).