The asymmetric unit of the title compound, C(8)H(6)N(8)·2H(2)O, contains one half-mol-ecule, with the benzene ring on a centre of symmetry, and two uncoordinated water mol-ecules. The benzene ring is oriented at a dihedral angle of 34.43 (12)° with respect to the tetra-zole ring. Strong O-H⋯N hydrogen bonds link the water mol-ecules to the N atoms of the tetra-zole ring. In the crystal structure, strong inter-molecular O-H⋯O and O-H⋯N hydrogen bonds link the mol-ecules into a network. One of the water H atoms is disordered over two positions and was refined with occupancies of 0.50.