Results of a first stage of the environmental monitoring programme using epiphytic lichens in the Kar- konoski National Park are presented. The investigations were carried out on 630 sample plots, regularly distributed in whole area of KNP. On each sample plot three so-called monitoring trees with the richest lichen vegetation (altogether 1462 trees) were examinated in detail. 71 lichen species and two taxa of non-lichenized fungi growing on resin were found. Only one of them - Lecanora conizaeoides - was common in the whole investigated area, another four taxa: Cladonia digitata, Hypogymnia physodes, Micarea botryoides and Pseudeverma furfuracea were also frequent. Other species were rarely found. Lichens the most sensitive to air pollutin, e g. Bacidia rubella, Bryoria capillaris, Mycoblastus affinis, Pertusaria coronata, Porina leptalea and Usnea subfloridana occured only on single localities. The number and ecological spectrum of lichen species found on particular sample plots confirm profound changes in epiphytic lichen flora of Karkonosze Mts and still insufficient air quality in this area. epiphytic lichens, monitoring, Karkonoski National Park