The asymmetric unit of the title compound, C(21)H(21)NO(2)S, comprises two mol-ecules with similar conformations. The benzene rings of the nitro-gen-bound benzyl groups lie to the same side of the mol-ecule but are splayed in opposite directions precluding π-π inter-actions between them. In the crystal, each independent mol-ecule self-associates via inter-molecular C-H⋯O inter-actions, forming a supra-molecular chain propagating along the b axis.