In the title compound, the silver(I) metal center sits on a twofold rotation axis, as does the coordinated nitrato anion. The two 2-thienyl groups of the ligand make dihedral angles of 17.14 (9) and 77.55 (6)° with respect to the quinoxaline plane. The thienyl group that is less planar with the quinoxaline ring exhibits ring-flip disorder.