The health ministry said on its website that the latest person to fall victim to the Middle East Respiratory Syndrome was a 59-year-old man who died yesterday in the western city of Taif.
It reported two new infections, one in Riyadh and the other in the commercial capital of Jeddah, raising the total number of MERS cases to 531.
Other nations including Egypt, Jordan, Lebanon, the Netherlands, the United Arab Emirates and the United States have also recorded cases, mostly in people who had been to the desert kingdom.
Like SARS, it appears to cause a lung infection, with patients suffering coughing, breathing difficulties and a temperature. But MERS differs in that it also causes rapid kidney failure.