  We investigate cold dense matter in the context of Sakai and Sugimoto's
holographic model of QCD in the Wigner-Seitz approximation. In bulk, baryons
are treated as instantons on S^3\times R^1 in each Wigner-Seitz cell. In
holographic QCD, Skyrmions are instanton holonomies along the conformal
direction. The high density phase is identified with a crystal of holographic
Skyrmions with restored chiral symmetry at about 4 Mkk^3/pi^5. As the average
density goes up, it approaches to uniform distribution while the chiral
condensate approaches to p-wave over a cell. The chiral symmetry is effectively
restored in long wavelength limit since the chiral order parameter is averaged
to be zero over a cell. The energy density in dense medium varies as n_B^{5/3},
which is the expected power for non-relativistic fermion. This shows that the
Pauli exclusion effect in boundary is encoded in the Coulomb repulsion in the
bulk.
