The title complex, [Al(C9H13N2S)3], is composed of an aluminium atom coordinated by three bidentate thiopyridazine ligands in an octahedral environment. It has approximate C3 symmetry, with Al—N distances in the range 1.9732 (17)–1.9794 (17) Å and three Al—S distances in the range 2.3961 (8)–2.4354 (8) Å. In the crystal, there are no significant intermolecular interactions present.