  We present our analysis on the photon structure functions at small Bjorken
variable x in the framework of the holographic QCD. In the kinematic region, a
photon can fluctuate into vector mesons and behaves like a hadron rather than a
pointlike particle. Assuming the Pomeron exchange dominance, the dominant
hadronic contribution to the structure functions is computed by convoluting the
probe and target photon density distributions obtained from the wave functions
of the U(1) vector field in the five-dimensional AdS space and the
Brower-Polchinski-Strassler-Tan Pomeron exchange kernel. Our calculations are
in agreement with both the experimental data from OPAL collaboration at LEP and
those calculated from the parton distribution functions of the photon proposed
by Gl\"uck, Reya, and Schienbein. The predictions presented here will be tested
at future linear colliders, such as the planned International Linear Collider.
