Bacteria of the genus Enterococcus spp. are an integral part of the gastrointestinal microflora of humans and animals, and are also considered opportunistic pathogens. The species of enterococci that are most commonly isolated from pet birds are E. faecalis and E. faecium. The development of antimicrobial resistance is an increasingly common problem in human and veterinary medicine, especially due to the inappropriate use of antibiotics in all types of animals, including pet birds. The emergence of multidrug-resistant strains of enterococci is of increasing concern around the world, and it has been proven that free-living wild birds are a possible reservoir of enterococci resistant to vancomycin and gentamicin, but that captive birds can be a potential source of multidrug-resistant isolates, too. The aim of this study was to determine the extent to which bacteria Enterococcus spp., isolated from pet birds, are susceptible to antimicrobial substances. The study was performed on 5 isolates belonging to the species E. faecium/hirae (1 isolate) and E. facealis (4 isolates), and their sensitivity to 12 different antimicrobial substances by disk diffusion method was examined. Resistance to amoxicillin, cephalexin, gentamicin, flumequine, penicillin, and tylosin was most common, whereas resistance to enrofloxacin, marbofloxacin, streptomycin, and trimethoprim / sulfamethoxazole was low. One isolate was resistant to three tested antimicrobials, one to four, while the remaining three isolates were multiple resistant to 7 or more investigated antibiotics. The isolate of E. faecalis, isolated from the African gray parrot, was resistant to all 12 tested antibiotics. The results obtained confirm that pet birds can be a source of resistant enterococci for animals or humans. Further research on a larger number of samples is needed to confirm these results, with the possible use of modern molecular methods to prove the genes responsible for resistance.