Black single crystals of MnBiS2Br were obtained by the reaction of stoichiometric amounts of alpha-MnS, Bi, S, and BiBr3 (3:2:3:1) at 600 degrees C for 4 weeks. The compound crystallises in the monoclinic system, space group C2/m, with a = 12.767(2), b = 3.9468(4), c = 9.574(1) A, beta = 90.87(2)degrees, and Z = 4. The crystal structure refinement based on 720 reflections converged at R = 0.0244 and wR2 = 0.0579, respectively. MnBiS2Br forms a layer structure consisting of MnS6 octahedra, MnS2Br4 octahedra, and BiS3+2 pyramids.