  Recently, Onari and Kontani submitted a paper [arXiv:1105.6233] which
criticizes our recent theoretical study [arXiv:1103.0586] on the neutron
scattering experiment as a probe for determining the superconducting gap in the
iron pnictides. In their paper, Onari and Kontani have developed a formalism in
which the imaginary part of the dynamical spin susceptibility
(Im$\chi_s(\Vec{q},\omega)$) in the superconducting state can be more
accurately calculated especially in the $\omega<2\Delta$ regime, where $\Delta$
is the superconducting gap. In section IIIC of their paper, they mention that
the conclusions of our paper are "incorrect based on inaccurate numerical
calculation". In the present Comment, we show that this in fact is not correct.
