ABSTRAK Taman Wisata Alam Pulau Weh merupakan habitat dari sebagian besar satwa termasuk monyet ekor panjang (Macaca fascicularis). Monyet ekor panjang menjadi salah satu objek wisata sehingga memudahkan transmisi agen penyakit, salah satunya parasit cacing. Penelitian ini bertujuan untuk mendapatkan informasi jenis-jenis parasit cacing saluran pencernaan pada monyet ekor panjang di kawasan Taman Wisata Alam Pulau Weh Sabang. Sampel berupa 30 spesimen feses yang diambil pagi hari kemudian dimasukkan kedalam botol sampel dan ditambahkan formalin 10% dan diperiksa di Laboratorium Parasitologi Fakultas Kedokteran Hewan Universitas Syiah Kuala menggunakan metode Natif, Sentrifus, Formol-ether, dan Sedimentasi. Hasil penelitian menunjukkan bahwa monyet ekor panjang terinfestasi parasit cacing jenis Ascaris sp. (76,7%), Strongyloides sp. (30%), Ancylostoma sp. (3,3%), Enterobius sp. (3,3%), Trichuris sp. (6,7%), dan Fasciolopsis sp. (10%) dan ditemukan infestasi campuran antara kelas Nematoda dengan Nematoda lainnya (20%) dan antara kelas Nematoda dan Trematoda (10%). Monyet ekor panjang (Macaca fascicularis) di Taman Wisata Alam Pulau Weh Sabang terinfestasi oleh parasit cacing jenis Ascaris sp., Strongyloides sp., Ancylostoma sp., Enterobius sp., Trichuris sp., dan Fasciolopsis sp. dengan masing-masing bentuk infestasi tunggal dan campuran yang tergolong kedalam infestasi sedang. Kata Kunci : Macaca fascicularis, Parasit Cacing, Taman Wisata Alam Pulau Weh, Sabang ABSTRACT Wildlife reserve park Weh Island is a habitat of most animals including long-tailed macaque. Long-tailed macaque become one of the attractions so as to facilitates the transmission of disease agents, for example parasitic worms. The aim of this research was to obtain information and to identify the types of parasitic worms gastrointestinal of long-tailed macaque from Wildlife reserve park weh island Sabang. 30 samples taken in the morning were put into bottle samples then added 10% formalin and examined in Parasitology Laboratory Faculty of Veterinary Medicine Syiah Kuala University with Natif, Sentrifus, Formol-ether and Sedimentation methods. The result showed that long-tailed macaque were infested with types of parasitic worms Ascaris sp. (76,7%), Strongyloides sp. (30%), Ancylostoma sp. (3,3%), Enterobius sp. (3,3%), Trichuris sp. (6,7%), and Fasciolopsis sp. (10%) and mixed infections were found between one Nematode class with another nematodes classes (20%) and between the Nematode and Trematode classes (10%). Long-tailed macaque in wildlife reserve park Weh Island was infested with types of worm parasites Ascaris sp., Strongyloides sp., Ancylostoma sp., Enterobius sp., Trichuris sp., and Fasciolopsis sp. with each single and mixed forms of infestation classified as medium infestations. Keywords : Macaca fascicularis, Parasitic Worms, Wildlife Reserve Park Weh Island, Sabang