  We compute a shift of baryon mass spectra due to quark masses in
perturbation, in Sakai-Sugimoto model of holographic QCD. We find the shift for
the ground state nucleons to be \delta M = 4.1 m_{\pi}^2 [GeV^{-1}], which is
consistent with the current lattice QCD result. We predict the same value of
the shift for N(1535) and Delta, while a larger value 7.7 m_{\pi}^2 [GeV^{-1}]
for Roper N(1440). We also present some evidences that the shifts of the vector
meson masses are suppressed in the large 't Hooft coupling limit.
