The latest deaths occurred between March 6 and 12, mostly in the capital Riyadh, bringing to 17 the number of MERS deaths so far this month, according to the ministry.
Middle East Respiratory Syndrome coronavirus (MERS-CoV) killed 30 people last month in the kingdom, which has been worst-hit by the virus.
Its symptoms can include fever, coughing and shortness of breath.
Last week the health ministry started the latest phase of a public education campaign aimed at preventing the virus from spreading.
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Abdul Aziz bin Saeed, who heads the centre coordinating the health ministry's response to MERS, warned in early February that virus cases typically surge early in the year when there are more juvenile camels circulating.
More than 20 countries have been affected by the virus, with the most cases in Saudi Arabia.
A total of 950 people have been infected with MERS since it was first identified in the kingdom in 2012, and 412 of them have died.