In contexts of Amazonian rural communities, the Ethnobotany as an important approach to rescue, characterize and valorize the traditional knowledge of riverside communities at Amazon Forest, for keep the intellectual property rights of these communities and guarantees the necessary conditions for maintenance socio-cultural structures in a process of traditional knowledge reproduction, associated with economic and environmental interests. The objective of this research was to characterize the ethnobotanical profile and the diversity of traditional knowledge about the use of plants among the three riverside communities in savannah ecosystems at Tapajos River Basin. The methodology characterizes for an interview per family in each community and then, the date will analyzed to determine the follow variables; The Relative Frequency of Citation (RFC) of plant species; Value of Use (VU); Fidelity Level (FL); Relative Popularity (RP) and Rank Order Priority (ROP). The results shown that plant traditional knowledge by riparian communities in Tapajós River Basin presents diversity among the communities studied, which is a rich scenario, with a greater or less homogeneity of this knowledge diversity by community. Medicinal plants such as Erva Cidreira (Lippia alba); Capim Santo (Cymbopogon citratus) and Cumaruzinho (Justicia pectoralis) deserve attention, since they are the species with the highest values of use by these communities.