Matéq is an Austronesian language of the Land Dayak (Bidayuhic) subgroup spoken by around 10,000–20,000 people in West Kalimantan (Borneo), Indonesia. This thesis presents a sketch grammar of the language based on linguistic fieldwork conducted from September 2012 to January 2013. Topics discussed in the sketch grammar include the geographic and social context of the Matéq language, its phonology and elements of its morphosyntax. Major features of Matéq phonology include the presence of both plain and prenasalised plosives, geminate nasals, and nasal vowels that contrast with oral vowels in certain positions. In terms of morphosyntax, this study shows that Matéq has two sets of personal pronouns which encode information about the generational relationships between speech participants or referents. With respect to grammatical voice, findings suggest that Matéq has five distinct voice constructions which can be distinguished on the basis of their morphosyntactic and semantic properties. Each voice construction also tends to have different pragmatic and TAM associations. This study also shows that Matéq has optional subject marking with certain verbs, and has both continuous and discontinuous serial verb constructions.