  We propose a non-thermal scenario for the generation of baryon number
asymmetry in a radiative neutrino mass model which is modified to realize
inflation at the early Universe. In this scenario, inflaton plays a crucial
role in both generation of neutrino masses and lepton number asymmetry. Lepton
number asymmetry is firstly generated in the dark matter sector through direct
decay of inflaton. It is transferred to the lepton sector via the dark matter
annihilation and then converted to the baryon number asymmetry due to the
sphaleron interaction. All of the neutrino masses, the baryon number asymmetry
and the dark matter are intimately connected to each other through the
inflaton.
