Insects have both positive and negative sides to humans, both directly and indirectly. This study aims to determine the diversity of insects in Leweung Buah Gunung Ciremai National Park area. Data collection in this study used the sweep net method, food trap and literature study on insect morphology. Data analysis used relative frequency and relative density, while diversity used the Shannon Winner Index and morphological identification using the google lens method, Identification guide for butterflies of West Java: families Papilionidae, Pieridae and Nymphalidae and BugGuide.net 2013, Discoverlife.org. The results showed that Leweung Buah in Gunung Ciremai National Park has 8 orders which include: Araneae, Coleoptera, Diptera, Hemiptera, Hymenoptera, Lepidoptera, Odonata and Phasmatodea. And 39 species with the highest number of species, Lethe confusa godana, and the least Ariadae pravera esra, Cupha clagia clagia and Delias dorylea dorylea. The largest relative density is occupied by thespecies Idea ieuconoe javana with a percentage of 16.11% and the lowest is in the Lucilia sericata, Apis cerana and Appias leptis leptis species, for the largest relative frequency it is occupied by thespecies Lethe confusa godana with a percentage of 13.33%. and the lowest was in the species appias leptis leptis, Ariadae pravera esra and Chersonnesia rahria rahria with a percentage of 1.11%. For the diversity of insects in Leweung Buah, Gunung Ciremai National Park, it is categorized as high and acts as a pollinator that maintains ecosystem stability.