In the title compound, C16H10N2S2, the thienyl rings are inclined to one another by 62.71 (10)°, and are inclined by 63.94 (8) and 21.35 (8)° to the quinoline mean plane [maximum deviation = 0.031 (2) Å]. In the crystal, the mol-ecules pack in a herringbone pattern, with π-π stacking inter-actions [centroid-centroid distances = 3.7381 (15) and 3.7268 (15) Å].