  We review the status of the electric dipole moment (EDM) of neutron in the
Standard Model (SM). The contributions of the strong and electroweak
interactions are discussed seperately. In each case the structure of the
Lagrangian and the sources of CP violation are specified, and calculational
details are given subsequently. These two contributions to the neutron EDM
exist in any extension of the SM including supersymmetry, two--doublet models
as well as models with more than three generations of fermions. We do not
discuss the EDM in such extensions; however, we briefly summarize their
predictions with a detailed account of the related literature.
