The Tiram Tapakih Mangrove Beach area is one of the natural tourism objects as well as the rehabilitation of the coastal ecosystem located in the Ulakan Tapakis District, Padang Pariaman Regency. The purpose of this study was to analyze the factor of the level of participation of the Tiram Tapakih community in the rehabilitation of the coastal ecosystem. The research was conducted in November 2019 -January 2020 in Ulakan Tapakih District, Padang Pariaman Regency. This type of research uses quantitative descriptive, then primary data and secondary data and analyzed using multiple regression analysis. The results showed that overall community participation factors were age, number of family members, education level, length of stay, income, type of work, knowledge, tourism potential for coastal ecosystem rehabilitation, types of coastal ecosystem rehabilitation tourism services, support from the government, NGOs and private sector. influence on community participation with F count 75.017> 1.95. Meanwhile, factors that have a very significant influence on the level of community participation are age, type of work, knowledge and support from the government and the private sector.