In the title compound, [Fe(N(3))(2)(C(6)H(6)N(4))(2)], the Fe atom is bonded to two azide ions located in axial positions and to two equatorially positioned bidentate biimidazole ligands, forming a slightly distorterd octa-hedron. The non-H atoms of the equatorial plane are coplanar, with a mean deviation of 0.0355 (2) Å. The Fe(II) cation lies on an inversion centre. Thus, the asymmetric unit comprises one half-mol-ecule.