Echis megalocephalus, also known commonly as the big-headed carpet viper[2] and Cherlin's saw-scaled viper,[3] is a species of venomous snake in the family Viperidae.

The species is endemic to one island in the Red Sea off the coast of Eritrea.

[4] E. megalocephalus grows to a total length (including tail) of 54–62 cm (21–24 in), which is relatively large in comparison to other Echis species.

The color pattern varies, but generally consists of a series of pale, oblique, dorsal blotches set against a darker ground color.

[2] E. megalocephalus is known only from the type locality, Nokra (Nocra) Island, which is part of the Dahlak Archipelago, off the coast of Eritrea in the Red Sea.