In the title compound, [FeII(NCS)2(CH6N4S)2], the Fe(II) cation is surrounded by two S atoms and two N atoms from thiocarbohydrazide groups and by two N atoms from thiocyanate groups. The geometry around the FeII cation, which is located on a center of inversion, is distorted octahedral. The thiocarbohydrazide molecule assumes a cis-trans conformation, which is reinforced by an N-H...N hydrogen bond. Molecules of the title compound are connected via intermolecular N-H...S and N-H...N hydrogen bonds to form a three-dimensional network structure.