Definitions on invasive alien species (IAS) are multiple, they are built using various combinations of a number of criteria: species origin (exotic or non-native), ability to reproduce in the wild (acclimatized and naturalized), environmental impact, etc. It refers to an organism whose presence in a given area is due to intentional or accidental introduction by man or others kinds of human activity. An alien species is considered as invasive when it is naturalized and able to increase population size, to disperse widely in the environment and colonize wide range of semi-natural and natural habitats. Establishment of so named blacklists is one of the attempts to focus on the issue of biological invasions of alien species that pose the most significant threat to regional biodiversity of a certain region. Blacklists contain biological and ecological characteristics, information on invasive species distribution, environmental and economic impact, control measures, etc. In 2016 ‘Black book of invasive animal species in Belarus’ have been published by Belaruskaya Navuka publishing house. It provides information on the most dangerous invasive species of Belarusian fauna, namely 1 species of reptiles, 3 species of fishes and 2 species of mammals, 6 species of aquatic and 21 species of terrestrial invertebrates. The last ones include 1 species of slugs (Krynickillus melanocephalus Kaleniczenko; Mollusca: Gastropoda: Agriolimacidae), 3 species of gall mites (Aceria erinea (Nal.), Aculus hippocastani (Fockeu), Vasates quadripedes Shimer; Arachida: Acariformes: Eriophyidae), 12 species of Hemipterous (Psylla buxi L. (Psyllidae), Parthenolecanium fletcheri (Cockerell) (Coccidae), Cholodkovskya viridana (Chol.) (Adelgidae), Pemphigus spyrothecae Pass. (Pemphigidae), Drepanosiphum platanoidis (Schrnk.), Panaphis juglandis (Gz.) and Phyllaphis fagi L. (Drepanosiphidae), Aphis craccivora Koch, Aphis spiraecola Patch, Brachycaudus divaricatae Shap., Cryptomyzus ribis L. and Hyadaphis tataricae Aiz. (Aphididae); Insecta: Hemipteroidea: Sternorrhyncha), 1 species of Coleopterous (Harmonia axyridis (Pall.); Insecta: Coleoptera: Coccinellidae), 1 species of Dipterous (Insecta: Coleoptera: Cecidomyiidae) and 4 species of Lepidopterous (Cameraria ohridella Deschka & Dimic, Phyllonorycter issikii (Kumata), Phyllonorycter robiniella (Clemens), Parectopa robiniella Clemens; Insecta: Lepidoptera: Gracillariidae) insects. All these non-native species of terrestrial invertebrates have wide or local geographical distribution in region and have a negative economic or environmental impact under the condition of Belarus. The study was supported partly by the BFBR (grants no. B15-063 and no. B16М-073).