After Kermanshah Province’s earthquake, which was occurred On 12 November 2017, comprehensive damages were seen in concretes used in structural elements of buildings, specially concrete structure buildings. The Concrete Technology Department of Building, housing & Urban Development Research Center was missioned to assess the quality of concrete used in the area. For this purpose, some inspections were conducted in Islam Abad and Sarpol-e Zahab cities. In these inspections, the general conditions of concretes were assessed visually and also, the nondestructive test method of Schmidt hammer was used to investigate the compressive strength of the concretes of the structures. The obtained concrete compressive strengths were too low. In some cases, the strength results were lower than one third of the specified compressive strengths which were mentioned in the structural drawings and much lower than the acceptable limit assigned in codes for structural concrete (20 MPa). It can be concluded that the low strength of concrete was one of the major causes of the widespread deteriorations after the earthquake.