  We examined the possibility of spontaneous baryogenesis driven by the
inflaton in the scenario of \textit{spiral inflation}, and found the parametric
dependence of the late-time baryon number asymmetry. As a result, it is shown
that, depending on the effective coupling of baryon/lepton number violating
operators, it is possible to obtain the right amount of asymmetry even in the
presence of a matter-domination era as long as such era is relatively short. In
a part of the parameter space, the required expansion rate during inflation is
close to the current upper-bound, and hence can be probed in the near future
experiments.
