The paper deals with unreliable narration in the three prosaic works by Ladislav Fuks (1923−1994) from the 60ties of the 20th century: „Pan Theodor Mundstock“ (1963), „Variace pro temnou strunu“ (1966) and „Spalovač mrtvol“ (1967). Although narrative modes of these novels are different, just like category of unreliability can explain discrepancies of the text and of the construction of its fictional world. The researcher understands unreliability as a consequence of a violation of protagonist ́s personality, (schizophrenia, pubescent hypersensitiveness, or a hiding sadistic psychopathy). Unreliability in analysed texts which rank among Fuks’s most famous books must be perceived in scope of writer ́s ingenious and wide-ranging play with a reader. At the same time it can be rated an articulation of the time of the Nazi danger, which the narration of all texts is situated to, of the time endangered human dignity and liberty.