In the Stargate fictional universe, the alien species Goa'uld use a device called a sarcophagus to rapidly heal injuries and extend their lifespans. The device can also bring the recently deceased back to life.

In the Stargate feature film, Daniel Jackson encounters a sarcophagus for the first time after being killed by a blast from a Jaffa's staff weapon, awakening inside with no wounds on his body. He uses the device again to revive Sha'uri, who had been killed by another staff. Later in the Stargate SG-1 television series (in the episode "Need"), Jackson becomes addicted to the device, demonstrating symptoms common to the Goa'uld who regularly use them, including paranoia, egotism, and megalomania. The general rule seems to be that when the sarcophagus is used to heal someone who's been badly injured, the side effects are insignificant. However, when an already healthy person rests inside the sarcophagus, they become increasingly addicted to the device's effects and eventually develop a more malevolent personality. Their prolonged use of the sarcophagus is one of the reasons why the Goa'uld are so evil (the other reason being their genetic memory).

The sarcophagus was created by an ancient Goa'uld known as Tel'chak. The sarchophagus was derived from the Ancients' healing technology (a sample of which was recovered from South America in season 7 by Jackson.) The Tok'ra do not use sarcophagi, claiming that it damages the soul (as demonstrated by Jackson in "Need"). The Goa'uld use the device on prisoners when their torture methods accidentally/intentionally kill their victims.

The Stargate term is derived from a Sarcophagus, being a stone container for a coffin or body.