A full 39 of the deaths have been this month, sparking growing public concern about the virus that first emerged in April 2012.
Among the latest deaths was a nine-month-old infant, the ministry said.
The number of recorded infections in the kingdom has risen to 339, it added.
Among them were four medical staff at a single hospital in Tabuk in the northwest, two doctors -- one Egyptian and one Syrian -- and two Philippine nurses.
Panic over the spread of the virus among medical staff in the western city of Jeddah led to the temporary closure of a main hospital's emergency room.