In the crystal structure of the title compound, C(14)H(12)ClNO(2)S, the mol-ecules display a trans conformation with respect to the C=N double bond. The dihedral angle between the methyl-sulfonyl benzene and chloro-benzene rings is 59.59 (8)°. The crystal packing is stabilized by weak C-H⋯O inter-actions and by π-π stacking inter-actions between inversion-related methyl-sulfonyl benzene rings [centroid-centroid distance = 3.8579 (11) Å].