ABSTRACT. Field surveys within the Bi Doup Nui Ba National Park located in north-east part of the Dalat Plateau (Lam Dong Province, southern Vietnam), from 2002 to 2009, have allowed us to document the local presence of 36 species of small mammals. These include one tree shrew (Tupaiidae), one mole (Talpidae), three shrews (Soricidae), two roundleaf bats (Hipposideridae), two horseshoe bats (Rhinolophidae), eight evening bats (Vespertilionidae), one bent-winged bat (Miniopteridae), six squirrels (Sciuridae), ten mice and rats (Muridae), one bamboo rat (Spalacidae) and one porcupine (Hystricidae). Thus, though because of climatic features the bat fauna is relatively deplete, the Dalat Plateau on the whole has one of the most diverse mammalian faunas in southern Vietnam.