  We explain the $750$ GeV diphoton resonance in the context of the dark
left-right symmetric model. A global symmetry in this model, stabilizes the
dark matter and ensures that the scalar couples dominantly to gluons and
photons. The branching fraction of the scalar to diphoton is large as a
consequence of the symmetries of the theory. The benchmark values assumed to
fit the diphoton signal also give the correct relic density of dark matter and
muon $(g-2)$. A specific prediction of this model is that the dark matter has a
mass of 200 GeV.
