  We discuss the possibility of unifying dark matter physics and inflation in
the $Z_5$ model of the two-component dark matter. Inflation driven by the
two-component dark matter fields can be divided into two cases, singlet dark
matter inflation and mixed dark matter inflation, where both two-component play
the role of inflaton in the latter case. For dark matter, we focus on the mixed
dark matter inflation case. We show a viable parameter space that satisfies the
theoretical and dark matter relic density constraint in the case of successful
inflation. It turns out that the dark matter density is dominated by the light
component, which is consistent with the feature of the $Z_5$ model of the
two-component dark matter.
