The protected tree is a tree which protected in the country for reproduction, preservation, and academic reference. There are many species of trees, mainly Zelkova, Ginkgo, Celtis, Pine, and Sophora. The lichen on the protected tree is microorganisms known as a symbiosis of fungi and algae, and algae are autotrophic by photosynthesis. This study is one of the results of regional and species studies through the taxonomy of lichen natives to protect trees and stone cultural properties. The Gyeonggi-do, Chungcheong-do and Gyeongsang-do surveys showed the largest number of lichens (63) is zelkova. The most dominant species were Candelaria asiatica (11), Phaeophyscia limbata (10), Hyperphyscia crocata (7). Those three species accounted for 44% of all species collected in zelkova. Zelkova is the most identified species of protected trees and is a common tree around us. Lichen identified in the tree is also a common lichen that can be seen around us and it is closely related to inhabiting in the neighborhood.