In the title compound, C(18)H(11)BrN(4)OS, the imidazothia-diazole and benzisoxazole rings are individually planar with maximum deviations of 0.025 (3) 0.015 (4) Å, respectively, and are inclined at an angle of 23.51 (7)° with respect to each other. The planes of the imidazothia-diazole and bromo-phenyl rings are inclined at an angle of 27.34 (3)°. In the crystal, inter-molecular C-H⋯N inter-actions result in chains of mol-ecules along the b and c axes. Moreover, C-H⋯O inter-actions result in centrosymmetric head-to-head dimers with R(2) (2)(24) graph-set motifs. The mol-ecular packing is further stabilized by π-π stacking inter-actions between the imidazole rings with a shortest centroid-centroid distance of 3.492 (3) Å. In addition, C-H⋯π inter-actions are observed in the crystal structure.