  The enrichment of the Intra-Cluster Medium (ICM) with heavy elements is
reviewed. There is now good observational evidence for enrichment including
abundance ratios and metallicity distributions. Various processes involved in
the enrichment process -- ram-pressure stripping, galactic winds, galaxy-galaxy
interactions, AGN outflows and intra-cluster supernovae -- are described.
Simulations of the ICM evolution taking into account metal enrichment are
presented.
