Viridovipera truongsonensis (Orlov, Ryabov, Thanh & H. Cuc, 2004) Trimeresurus truongsonensis is a venomous pitviper species endemic to Vietnam.

[1][2] Its common names are Truong Son pit viper[1] and Quang Binh pitviper.

[2] This species is known with certainty only from the Phong Nha-Ke Bang National Park, Quang Binh province, in the Annamite Mountains of central Vietnam.

[1] This species is found in evergreen tropical forests at elevations of 500–600 m (1,600–2,000 ft) above sea level.

These secretive snakes are mostly seen when basking following strong rains.