  We discuss inflation and dark matter in the inert doublet model coupled
non-minimally to gravity where the inert doublet is the inflaton and the
neutral scalar part of the doublet is the dark matter candidate. We calculate
the various inflationary parameters like $n_s$, $r$ and $P_s$ and then proceed
to the reheating phase where the inflaton decays into the Higgs and other gauge
bosons which are non-relativistic owing to high effective masses. These bosons
further decay or annihilate to give relativistic fermions which are finally
responsible for reheating the universe. At the end of the reheating phase, the
inert doublet which was the inflaton enters into thermal equilibrium with the
rest of the plasma and its neutral component later freezes out as cold dark
matter with a mass of about 2 TeV.
