  We propose a gravity dual for the holographic superconductor with multi-band
carriers. Moreover, the currents of these carriers are unified under a global
flavored SO(3) symmetry, which is dual to the bulk SO(3) gauge symmetry. We
study the phase diagram of our model, and find it qualitatively agrees with the
one for the realistic 2-band superconductor, such as $MgB_2$. We also identify
the bulk field dual to the electromagnetic $U(1)_{EM}$ current, which should be
invariant under the global flavored SO(3) rotation. We then evaluate the
corresponding holographic conductivity and find the expected mean field like
behaviors.
