  Inflating curvaton can create curvature perturbation when the curvaton
density is slowly varying. Using the delta-N formalism, we discuss the
evolution of the curvature perturbation during curvaton inflation and find
analytic formulation of the non-Gaussianity parameter. We first consider the
inflating curvaton with sufficiently long inflationary expansion. Then we
compare the result with short curvaton inflation.
