Dryophylax chaquensis, commonly known as Jararaca-Falsa (Portuguese), is a species of snake in the family Colubridae. The species is endemic to Brazil.
It is named after the type locality in the Argentinian Chaco. Another name for it is Thermodynastes chaquensis.
This species is partly aboreal. This species is found in Paraguay (Neembucu), Uruguay, Brazil, and Argentina (Santa Fe, Formosa, Chaco, Jujuy).
D. chaquensis has a vivparous mode of reproduction.