The present work brings together results of a sociolinguistic research that demonstrates the current situation of the use and teaching of the Sabanê language in the Sowaintê village. The data for were recorded during several field trips conducted in the years 2016 and 2017 and reveal that the Sabanê language is in serious danger of extinction, with few native speakers, and in the community focus of our investigation, there are only two speakers. In addition, the language is practically not taught in school, even with the efforts of some Sabanê teachers in promoting the teaching of their native language. The study was developed in the light of Dorian (1989) “Investigating obsolescence: studies in language contraction and death”, and in Thomason (2015) “Endangered languages. An introduction. “We have also considered the studies of Braga and Telles (2014), Telles (2002) and Araújo (2004) on the languages of the Nambikwára family. The results of the study show the advanced state of reduction of speakers of Sabanê and the urgency of the implementation of a linguistic policy that can give linguistic and pedagogical support to the revitalization of that language. ; O presente trabalho reúne resultados de uma pesquisa de abordagem sociolinguística que demostra a atual situação do uso e do ensino da língua Sabanê, na aldeia Sowaintê. Os dados para pesquisa foram registrados em várias viagens a campo realizadas nos anos de 2016 e 2017 e revelam que a língua Sabanê se encontra em sério risco de extinção, contando com poucos falantes nativos, sendo que na comunidade foco de nossa investigação, só há dois falantes. Além disso, a língua praticamente não é ensinada na escola, mesmo com o esforço de alguns professores Sabanê em promover o ensino de sua língua nativa. O estudo foi desenvolvido à luz de Dorian (1989) “Investigating obsolescence: studies in language contraction and death”, e em Thomason (2015) “Endangered languages. An introduction.” Consideramos, também, os estudos de Braga e Telles (2014) e de Telles (2002) ...