Bats (Ordo Chiroptera) are the only animals of the Mammalian that have wings to fly. Ecologically, bats have many roles in both biological and economic terms, but it is also known that bats can transmit disease, including diseases caused by ectoparasites. The ectoparasites that can infect bats are bat flies, lice, mites, fleas and ticks. They are vector of some zoonotic diseases caused by bacterial, protozoa, and viruses. This study is aimed at identifying and determining the diversity of ectoparasite species in bats in the Giant Cave of Tanjung Ringgit. This study was conducted from January to May, 2018 in four locations of cave, these are the Giant Raksasa Cave in Tanjung Ringgit, Gale-gale Bangkang cave in Prabu village, Buwun Cave in Prabu village and Kenculit cave on Semeti Beach. Ectoparasites were collected and identified in Biological Laboratory, FMIPA, University of Mataram. The research found that 14 species are ectoparasites, 7 species are insecta and 7 splecies are arthropods. They are from insect Cyclopodia horsfieldii, Eucampsipoda sundaica, Leptoyclopodia ferrari, Thaumapsylla breviceps, Megastrebla limbooliati, Raymondia pseudopagadarum and Ischnopsyllus hexactenus  and 1 spesies has not been identified. On the other hand, arthropods of arachnida are Amblyomma sp, Ornithodoros sp, Ancystropus aethiopicus, Ancystropus zeleborii, Meristaspis calcaratus, Meristaspis lateralis and Meristaspis kenyaensis.

Key words: Diversity, ectoparasites, bats, Southern Lombok.