Stone Masks are powerful ancient artifacts featured in the first two parts of JoJo's Bizarre Adventure, Phantom Blood and Battle Tendency. They are originally introduced as sacrificial devices used by certain vampiric Aztec cults.

Mounted ornamentally in the Joestar family estate by George Joestar I, one Stone Mask eventually transforms Dio Brando into a Vampire, extending his life, as well as his influence over a significant proportion of the series.

In Part 2, it is revealed that the Stone Masks were designed by Kars in an attempt to grant his race the ability to withstand sunlight.