In the title compound, C(14)H(14)N(2)O(2)S, a novel sulfonamide derivative, an intra-molecular C-H⋯O hydrogen bond generates an S(5) ring motif. The mol-ecule adopts a twisted E configuration around the C=N bond. An inter-molecular N-H⋯O hydrogen bond generates an R(2) (2)(8) ring motif. The dihedral angle between the rings is 85.37 (9)°. The H atoms of the methyl group have rotational disorder with refined site occupancies of ca 0.63/0.37. In the crystal structure, inter-molecular N-H⋯O hydrogen bonds link neighbouring mol-ecules into dimers which stack along the a axis with a centroid-centroid distance of 3.8856 (10) Å.