In the title compound, C(13)H(13)ClN(4)O, the dihedral angle between the aromatic rings is 33.47 (9)° and an intra-molecular N-H⋯N hydrogen bond generates an S(6) ring. In the crystal, inversion dimers linked by pairs of N-H⋯O hydrogen bonds occur, resulting in R(2) (2)(8) loops.