  The AdS/CFT correspondence allows to relate 4D strongly coupled theories to
weakly coupled theories in 5D AdS. We use this correspondence to study a
scenario in which the Higgs appears as a composite pseudo-Goldstone boson (PGB)
of a strongly coupled theory. We show how a non-linearly realized global
symmetry protects the Higgs mass and guarantees the absence of quadratic
divergences at any loop order. The gauge and Yukawa interactions for the PGB
Higgs are introduced in a simply way in the 5D AdS theory, and their one-loop
contributions to the Higgs potential are calculated using perturbation theory.
These contributions are finite, giving a squared-mass to the Higgs which is
one-loop smaller than the mass of the first Kaluza-Klein state. We also show
that if the symmetry breaking is caused by boundary conditions in the extra
dimension, the PGB Higgs corresponds to the fifth component of the bulk gauge
boson. To make the model fully realistic, a tree-level Higgs quartic coupling
must be induced. We present a possible mechanism to generate it and discuss the
conditions under which an unwanted large Higgs mass term is avoided.
