The title compound, C10H10N2.C4H8N2O2, consists of hydrogen-bonded 2,3-dimethylquinoxaline and dimethylglyoxime molecules. Both dimethylglyoximes are located on an inversion centre and there are two half-molecules in the asymmetric unit. The dimethylglyoxime molecules are linked about inversion centres to the 2,3-dimethylquinoxaline moiety by O-H . . .N hydrogen bonds (O . . .N 2.898 and 2.805 Angstrom) to form polymeric chains.