In the title compound, C(21)H(14)ClNO(2)S, the dihedral angle between the benzothia-zole and diphenyl methanone groups is 68.6 (2)°. The crystal structure consists of dimeric units generated by C-H⋯N bonds, further linked by C-H⋯O bonds and C-H⋯π and π-π inter-actions [centroid-centroiddistance = 3.856 (2) Å], which lead to a criss-cross assembly parallel to (001).