The title new diquinaldine derivative, C27H24N4, forms molecular assemblies organized by intermolecular quinoline pi-pi stacking [3.356 (3) and 3.440 (3) A] and both inter- and intramolecular N-H...N hydrogen bonds [3.039 (3)-3.104 (3) A and 129 (2)-172 (2) degrees]. The combination of such interactions provides readily definable contacts that propagate along each crystallographic axis.