Saudi Arabian criminal Mohammed al-Qahtani had been convicted of gunning down a fellow Saudi with an automatic weapon in an argument, the interior ministry said in a statement.
Most executions in the kingdom are carried out by beheading with a sword, in what the ministry says is a deterrent.
Rights experts have raised concerns about the fairness of the trials.
Al-Qahtani was executed in Riyadh.
London-based Amnesty International says Saudi Arabia had the world’s third-highest number of executions last year, far behind China and Iran, but ahead of Iraq and the United States.
Under the kingdom’s strict Islamic legal code, murder, drug trafficking, armed robbery, rape and apostasy are all punishable by death.
