The title mol-ecule, C(12)H(10)N(2)O(3)S, is nonplanar with an inter-planar angle of 33.44 (7)° between the benzene and thio-phene rings. In the crystal there exist only weak inter-molecular C-H⋯O inter-actions, π-π inter-actions between the benzene rings [centroid-centroid distance = 3.7465 (14) Å] and X-Y⋯π inter-actions to the thio-phene and benzene rings [N⋯centroid distances = 3.718 (3) and 3.355 (3) Å, respectively]. Inter-molecular C-H⋯O inter-actions link the mol-ecules into chains parallel to the a axis.