The asymmetric unit of the title compound, C20H12O2S2, contains two crystallographically independent molecules which differ in the orientations of thienylmethanone units with respect to the naphthalene ring system [dihedral angles of 65.30 (11) and 50.94 (11)° in one molecule, 41.94 (12) and 69.61 (13)° in the other]. The crystal structure is stabilized by C—H⋯O and C—H⋯π interactions
