In this study there were 33 types of medicinal plants utilized by people of Batu Katak Village that were directly bordered to the Gunung Leuser National Park. These medicinal plants can be found on community cultivation lands and forests of Gunung Leuser National Park. This research method was carried out with an inventory of types of medicinal plants and interviews with the community to find out the benefits and part plant medicinal plants used by Batu Katak Village community. Batu Katak community makes use of plants root, rhizome, stem, bark and leaves all parts of the plants as medicine. The most widely used part is the leaves (75%), as much as 25 % used part are rhizome, root, stem and bark. The majority of the people of Batu Katak Village are ethnic Karo. Karo ethnicity itself has local knowledge in using medicinal plants that have been passed down for generations.