  Basic properties of Regge poles are reviewed.
  Regge poles are considered from both t-channel and s-channel points of view.
The main part of the review is devoted to the Regge poles in QCD. The method of
the Wilson-loop path integral is used to calculate trajectories of Regge poles
for $q-\bar q$ and gluonic states. The problem of the Pomeron in QCD is
discussed in details. It is shown how to use the 1/N-expansion for
classification of reggeon diagrams in QCD. The role of Regge cuts in reggeon
theory is discussed and their importance for high-energy phenomenology is
emphasized. Models based on the reggeon calculus, 1/N-expansion in QCD and
string picture of interactions at large distances are reviewed and are applied
to a broad class of phenomena in strong interactions. It is shown how to apply
the reggeon approach to small-x physics in deep inelastic scattering.
