Colourless needle-shaped crystals of the title compound, (C26H21BrOP)2[Hg2Br6], have been prepared by addition of a solution of HgBr2 in methanol to a solution of (4-bromobenzoylmethyl)triphenylphosphorane in dry methanol. The compound features Hg2Br6
2− dianions, whose site symmetry is .