In the title compound, C(10)H(9)ClN(4)OS, an intra-molecular N-H⋯O hydrogen-bonding inter-action and an N-H⋯N inter-action generate ring motifs [graph sets S(6) and S(5), respectively]. In the crystal, mol-ecules form a chain through N-H⋯O hydrogen bonds, and these are extended by N-H⋯S hydrogen-bonding inter-actions into an infinite three-dimensional network. The crystal structure also exhibits weak C-H⋯π inter-actions.