The South Amazon Ecotones Ecological Corridor (Portuguese: Corredor Ecológico dos Ecótonos Sul-Amazônicos) is a proposed ecological corridor connecting conservation units and indigenous territories that form an ecotone, or transition between the south of the Amazon rainforest and the north of the cerrado of Brazil.

The first version of the Ecological Corridors of Tropical Forests of Brazil proposal was developed by a group of consultants at the request of the Brazilian Ministry of the Environment and presented in the first half of 1997.

It covers the ecotones in the interconnection between the south of the Amazon rainforest and the cerrado of Central Brazil.

It is located in the most threatened Amazon region due to the advance of agriculture and ranching in the north of Mato Grosso and south of Pará.

This brought its area up to 761,576 square kilometres (294,046 sq mi), including parts of the states of Amazonas, Rondônia, Pará, Mato Grosso and Tocantins.