Work to save Hernan Alberto Gil from the rubble of the nine-storey Galerias Playa Grande shopping centre began on Monday, according to Salvadorean President Nayib Bukele, who has been posting updates about the operation on X.
Rescuers were able to provide him with hydration via tubing, Bukele has said, but needed to dig two separate tunnels to try to reach him because of the instability of the ruins.
Gil was carried out of the rubble on a stretcher on Thursday morning and loaded into an ambulance as cheering rescuers and reporters looked on.
"This rescue was made possible thanks to the joint efforts of teams from Chile, the United States, Portugal, Mexico, Costa Rica, Venezuela and El Salvador, who worked tirelessly to remove debris, stabilise the structure and clear a path to reach Hernan," Bukele said on X.
The rescue took about 70 hours, Chile's firefighting service said in a post on X, but Gil was in good condition.
The 7.2- and 7.5-magnitude quakes struck less than a minute apart almost eight days ago, killing 2295 people, according to government figures published on Wednesday.
The number of people listed as still missing on an unofficial but widely used online list was down to 38,600 on Thursday morning, after peaking at nearly 60,000 in the days immediately after the quake.
Mobile phone service has remained patchy in La Guaira, the hardest-hit state, which is less than an hour from the capital Caracas.
A United Nations envoy this week said it was procuring 10,000 body bags for Venezuela and the USGS has estimated more than 10,000 deaths were possible.
Venezuela's socialist government, in power under three different leaders since 1999, has for years promoted "civilian-military-police unity" and high-ranking security officials hold power over huge business interests.
The army has about 2000 generals controlling disparate groups of poorly paid troops, while intelligence bodies like the domestic spy agency SEBIN and military counterintelligence DGCIM are involved in everything from processing repatriated migrants - including deportees who were killed during the quake - to surveillance of civilians and the alleged torture of political detainees, allegations of which are denied by the government.
State television regularly broadcasts images of interim President Delcy Rodriguez meeting with military and security officials and groups of heavily armed soldiers and dozens of police are patrolling major roads in La Guaira and sometimes directing traffic.
But the response to the disaster has been led by civilians, many of them volunteers.
Victims of the quake have spent days trying to dig out loved ones with their hands, shovels and pick axes, assisted by firefighters, civil protection corps, thousands of members of foreign rescue teams, student doctors and nurses, civilians who normally work as teachers and veterinarians and occasionally, a soldier.
Soldiers working for days alongside civilians in the six collapsed towers of a major public housing project in La Guaira told Reuters they had volunteered to help there.