  Collider signatures of the $SO(5) \times U(1)$ gauge-Higgs unification model
in the Randall-Sundrum warped space are explored. Gauge couplings of quarks and
leptons receive small corrections from the fifth dimension whose effects are
tested by the precision data. It is found that the forward-backward asymmetries
in $e^+e^-$ collisions on the $Z$ pole are well explained in a wide range of
the warp factor $z_L$, but the model is consistent with the branching fractions
of $Z$ decay only for large $z_L \simg 10^{15}$. Kaluza-Klein (KK) spectra of
gauge bosons, quarks, and leptons as well as gauge and Higgs couplings of
low-lying KK excited states are determined. Right-handed quarks and leptons
have larger couplings to the KK gauge bosons than left-handed ones. Production
rates of Higgs bosons and KK states at Tevatron, LHC and ILC are evaluated. The
first KK $Z$ has a mass 1130 GeV with a width 422 GeV for $z_L = 10^{15}$. The
current limit on the $Z'$ production at Tevatron and LHC indicates $z_L
>10^{15}$. A large effect of parity violation appears in the difference between
the rapidity distributions of $e^+$ and $e^-$ in the decay of the first KK $Z$.
The first KK gauge bosons decay into light and heavy quarks evenly.
