Shirin Khan Abbas Khan was put to death in Riyadh province after being found guilty of smuggling heroin into the kingdom in swallowed balloons, the interior ministry said.
In the whole of 2014, Saudi Arabia carried out 87 executions, and Amnesty International has spoken of a "macabre spike" in the kingdom's use of the death penalty this year.
The Gulf has become an increasingly important market for illicit drugs in recent years, the United Nations Office on Drugs and Crime says.
Drug trafficking, rape, murder, apostasy and armed robbery are all punishable by death under the kingdom's strict version of Islamic sharia law.
COMMENTS
Comments are moderated and generally will be posted if they are on-topic and not abusive.
For more information, please see our Comments FAQ