This study discussed the application of the Pentahelix model in the development strategies of Toba Samosir tourism. The current research was conducted using a qualitative method with a phenomenological approach. It aimed at exploring how stakeholder synergy in each formulation, as well as the development of tourism. Research data were collected through observation, interviews, literature review, and surveys. The results showed that the lack of synergy between stakeholders caused the low number of tourist visits. The government tends to assume that the stakeholders are the sole owner of the power so that the development of tourism has not been able to produce welfare, even, it tends to cause prolonged conflict within the community itself. Therefore, the current study proposes a vital step of pentahelix model, in which the government of local regency should have better synergy with stakeholders. interest include a wide range of topics related to Historical and Cultural Studies. He has supervised many theses and doctorate dissertations. He has participated in several national and international conferences and has written a lot of articles Dr. I Ketut Setiawan, M. Hum. Is a Doctor in Cultural Studies and head of Archeologi Departmen at Universitas Udayana, Denpasar, Indonesia. He received his Master in Archeologi from Universitas Indonesia in 1995 and his Doctorate in Cultural Studies from Universitas Udayana, Denpasar, Indonesia in 2011. His research interest include a wide range of topics related to Epigraphy, Culture, and tourism Studies. He has supervised many theses and doctorate disertations. He has published many articles and books and actively participated in national and international confrences and academic workshops