The article shows the results of floristic investigations on algoflora of the Riscani Lake. There were found 154 species and varieties of algae belonging to 6 phyla. These species belong to 77 genera, 39 families, 17 orders and 12 classes. The benthic algoflora develops abundantly on various types of substrates, forming a biomass from 10 g/m2 up to 1.5 kg/m2, where chlorophyta, cyanophyta and diatoms predominate. In general, Riscani Lake is characterised by a water pool with an algal vegetation described by an increased saprobic character. The saprobity index, calculated during the year is based on indicator species and amounts to 2.5-2.7.