  The study of neutrinoless double beta decay is of outmost importance for
neutrino physics. It is considered to be the gold plated channel to probe the
fundamental character of neutrinos and to determine the neutrino mass. From the
experimental point about nine different isotopes are explored for the search.
After a general introduction follows a short discussion on nuclear matrix
element calculations and supportive measurements. The current experimental
status of double beta searches is presented followed by a short discussion of
the ideas and proposals for large scale experiments.
