Common names: saw-scaled viper,(Sinhalese:වැලි පොළඟා), Indian saw-scaled viper, little Indian viper, more.

Echis carinatus, commonly called the saw-scaled viper, is a venomous viper species found in parts of the Middle East and Central Asia, and especially the Indian subcontinent. It is the smallest member of the Big Four snakes that are responsible for causing the most snakebite cases and deaths, due to various factors including their frequent occurrence in highly populated regions, and their inconspicuous nature. Five subspecies are currently recognized, including the nominate subspecies described here.