The Bieszczady Mts, a mountain range in SE Poland, is a hot spot of fungal richness and diversity in Poland. This paper summarizes 5 years of studies in the Bieszczady Mts, as well as previously published research. A total of 1,377 macromycetes taxa were found, including many (464) which were protected, red-listed, or very rare in Poland. Thirty-eight taxa (nine Ascomycota and 29 Basidiomycota) have been reported in Poland for the first time: <em>Agrocybe gibberosa</em>, <em>Auriporia aurulenta</em>, <em>Bolbitius variicolor</em>, <em>Bulgariella pulla</em>, <em>Chaetosphaerella phaeostroma</em>, <em>Clitocybe subspadicea</em>, <em>Clitopilus passeckerianus</em>, <em>Cortinarius anomalus</em> var. <em>subcaligatus</em>, <em>C. fervidus</em>, <em>C. flexipes</em> var. <em>inolens</em>, <em>C. sylvae-norvegicae</em>, <em>Cudoniella tenuispora</em>, <em>Entoloma bisporigerum</em>, <em>E. olorinum</em>, <em>E. poliopus</em> var. <em>parvisporigerum</em>, <em>E. sericeoides</em>, <em>Galerina caulocystidiata</em>, <em>Gymnopilus josserandii</em>, <em>Hymenoscyphus subferrugineus</em>, <em>Hypholoma olivaceotinctum</em>, <em>Inocybe queletii</em>, <em>Laccaria altaica</em>, <em>Lactarius romagnesii</em>, <em>L. rostratus</em>, <em>Mycena epipterygia</em> var. <em>atroviscosa</em>, <em>M. epipterygia</em> var. <em>candida</em>, <em>M. polygramma</em> f. <em>candida</em>, <em>Octavianina lutea</em>, <em>O. mutabilis</em>, <em>Pachyella violaceonigra</em>, <em>Panaeolus papilionaceus</em> var. <em>capitatocystis</em>, <em>Phaeocollybia jennyae</em>, <em>Psathyrella almerensis</em>, <em>Pyrenopeziza inornata</em>, <em>Scutellinia torrentis</em>, <em>Tricholoma basirubens</em>, <em>Tricholomopsis flammula</em>, and <em>Vibrissea decolorans</em>. For all new taxa, short descriptions based on the collected material have been provided.