The authors investigated the influence of 9 species of aquatic plants (Ceratophyllum demersum, Elodea canadensis, Hydrocharis morsus-ranae, Lemna minor, Nuphar luteum, Potamogeton natans, Sagittaria sagittifolia, Sparganium ramosum, Stratiotes aloides) on the occurrence of aquatic zoosporic fungus spe-cies in the water of three water bodies of different trophy. The fewest fungi were noted in the containers with Potamogeton natans (9), Elodea canadensis (15) and Hydrocharis morsus-ranae (16), the most in containers with Sparganium ramosum (23), Lemna minor (24) and Nuphar luteum (25). More fungi were found to grow in the containers with 7 plants than in the controls (the mean ratio of Co/Pl ranged from 1.7/3.7 to 6.7/8.7). However, for Potamogeton natans and Sparganium ramosum, control samples con-tained more fungus species. The mean ratio for the samples with Potamogeton natans was 5.7/2.7 and with Sparganium ramosum – 6.3/5.4.