The taxonomical study of the Coleoptera Tenebrionidae Platynotina of Madagascar is presented and illustrated. The Madagascan Platynotina comprise 37 species in 11 genera. Illustrated identification keys are proposed in French and in English to identify genera and species. This reference work contributes to the knowledge of the Malagasy biodiversity which is rich in endemic species. It provides an invaluable tool for all those who are working for the knowledge and protection of nature in Madagascar.