Jilemnický okultista (English title: The Jilemnice Occultist) is the second studio album by Czech black metal band Master's Hammer, self-released on December 1992 and distributed elsewhere by Osmose Productions in the following year. Self-described by the band as "the world's first black metal operetta" and largely inspired by King Diamond's rock operas (an early influence of Master's Hammer alongside another project fronted by their eponymous vocalist, Mercyful Fate), it is their first of two concept albums, the second being Vagus Vetus, released in 2014. On several early Osmose pressings "Jilemnice" is misspelt as "Filemnice", what would be corrected in later pressings. Despite the track listing being in English, all the lyrics are in Czech. The original release contained the Czech titles.

In this album, Vlastimil Voral joined Master's Hammer as a full-time member (he had already played on the band's previous album, Ritual., but was credited as a guest musician only).

Jilemnický okultista would be re-issued in 2017 by Franta Štorm's label Jihosound Records under digipak format with a slightly different cover art and two bonus tracks, taken from a preliminary demo tape version of the album recorded in early February 1992 (see below).