  Based on the stochastic gravity, we study the loop corrections to the scalar
and tensor perturbations during inflation. Since the loop corrections to scalar
perturbations suffer infrared (IR) divergence, we consider the IR
regularization to obtain the finite value. We find that the loop corrections to
the scalar perturbations are amplified by the e-folding; in other words there
appear the logarithmic correction, just as discussed by M.Sloth et al. On the
other hand, we find that the tensor perturbations do not suffer from infrared
divergence.
