New faunistic records concerning 18 species of rare and interesting beetles (Coleoptera: Eucinetidae, Buprestidae, Dermestidae, Nitidulidae, Silvanidae, Endomychidae, Coccinellidae, Zopheridae, Oedemeridae, Chrysomelidae) in the Mazurian Lakeland are given. During investigations 3 new species for the Mazurian Lakeland were found.