Firdaus, Muhammad2018-04-022018-04-022018-04-02wahyu sari yenihttps://repository.unri.ac.id/xmlui/handle/123456789/9336Taman Nasional Tesso Nilo (Tesso Nilo National Park) is the forest conservation area that has the real ecosystem managed with the zonation system. As one of the forest which has variety of species, the occupation such as forest encroachment and illegal logging, also deforestation happened. The limit of knowledge from the people around about the management of forest resources is the reason why forest encroachment and illegal logging happened. The purpose of this research is to understand the forest encroachment activity and the environmental communication pattern in the management of Taman Nasional Tesso Nilo in Pelalawan Regency, Riau Province. The methods used in this research is qualitative descriptive method. The location of this research is in Tesso Nilo National Park, Pelalawan Regency. This research is done from May until November 2017. The result of this research shows that the encroachment activity happened in Tesso Nilo National Park area, only a few of it are done by the people around Tesso Nilo National Park area, but most of it are done by the people coming from the other region. There are 3 typology of encroachment here; personal, group, and investor. Then, the environmental communication by Balai Taman Nasional Tesso Nilo (Bureau of Tesso Nilo National Park) about conservation and forest management can be reviewed in 3 communication patterns: first, pre-emtive communication by doing counseling communication, socialization, and strengthen the awareness of the people around the area to be aware and care about Tesso Nilo National Park area. Second, preventive communication by doing the patrol and wild animal conflict mitigation. Third, restoration communication and doing forest and land rehabilitation.enenvironmental communicationcommunication patternTesso Nilo NationalArticle