Strong linguistic and ecological pressures are gradually pushing Koromfe, the local language spoken in the north of Burkina Faso, West Africa, towards extinction. Spoken by, at the most, 10,000 people, Koromfe has defied political and cultural domination by other local languages. The information which constitutes this descriptive grammar is based on field work made by the author. As a Gur or Voltic language, the author shows how Koromfe shares many phonological, lexical, morphological and syntactic affinities with other such languages.