  We discuss issues in an attempt to put the Standard Model (SM) in
five-dimensional anti-de Sitter spacetime compactified on $S^1/Z_2$. The
recently-proposed approach to the gauge hierarchy problem by using this
background geometry, with the SM confined on a boundary, is extended to a
situation where (some of) the SM particles reside in the five dimensional bulk.
In particular, we find a localization of zero modes of bulk fermions near the
boundary with a negative tension. Unlike the compactification with the flat
metric, these fermion zero modes couple to Kaluza-Klein (KK) excitations of the
SM gauge bosons. Interestingly, only low-lying modes of such KK gauge bosons
have non-negligible couplings. Current electroweak precision data give a
constraint that the first KK mode be heavier than 9 TeV. We also argue that at
least the Higgs field should be confined on the brane to utilize the
Randall-Sundrum background as a solution to the gauge hierarchy.
