  We investigate the elastic photon-proton and photon-photon scattering in a
holographic QCD model, focusing on the Regge regime. Considering contributions
of the Pomeron and Reggeon exchange, the total and differential cross sections
are calculated. While our model involves several parameters, by virtue of the
universality of the Pomeron and Reggeon, for most of them the values determined
in the preceding study on the proton-proton and proton-antiproton scattering
can be employed. Once the two adjustable parameters, the Pomeron-photon and
Reggeon-photon coupling constant, are determined with the experimental data of
the total cross sections, predicting the both cross sections in a wide
kinematic region, from the GeV to TeV scale, becomes possible. We show that the
total cross section data can be well described within the model, and our
predictions for the photon-proton differential cross section are consistent
with the data.
