For each species, general habitat characteristics, ecological classification and distributional pattern are provided. Ecological classification is presented for the first time for the millipede species occurring in Slovakia and is proposed as a tool for ecological studies and for the nature protection purposes. Special remarks are given to the species newly found for Slovakia, Geoglomeris subterranea Verhoeff, 1908, Brachyiulus lusitanus Verhoeff, 1898, Cylindroiulus britannicus (Verhoeff, 1891), C. parisiorum (Brölemann & Verhoeff, 1896) and Polydesmus burzenlandicus Verhoeff, 1925, as well as to C. arborum Verhoeff, 1928, the species newly confirmed for Slovakia after more than 70 years.