Most of the injured were treated outpatient and were later released from hospital, Saeb Modarresi told the Islamic Republic News Agency (IRNA) in the western provincial capital city of Kermanshah.
He added that six of the injured were hospitalized.
The earthquake occurred in Tazehabad Sunday morning and had 25 aftershocks, Governor of Kermanshah Province Hushang Bazvand had earlier told IRNA.
Kermanshah has been jolted by several earthquakes since November 12, 2017, when a 7.3-magnitude earthquake hit the province's Ezgeleh region killing at least 620 people and injuring over 12,000.
Iran sits on major fault lines and is prone to near-daily earthquakes.
9376**1397
Follow us on Twitter @IrnaEnglish