  We investigate a dynamical mechanism to generate fermion mass in the
Randall-Sundrum background. We consider four-fermion interaction models where
the fermion field propagates in an extra-dimension, i.e. the bulk four-fermion
interaction model. It is assumed that two types of fermions with opposite
parity exist in the bulk. We show that electroweak-scale mass is dynamically
generated for a specific fermion anti-fermion condensation, even if all the
scale parameters in the Lagrangian are set to the Planck scale.
