Lepton‐flavor Conservation (LFC) is one of the corner stones of the standard model, but may be violated in almost any extension of it. The status of laboratory tests of LFC is reviewed, with emphasis on particle decays involving the charged leptons. A small violation could lead to measurable rates for some otherwise forbidden processes. A new round of dedicated searches for LFC‐violating &mgr; and K decays has started and some first results from the &mgr; experiments will be presented. ©1995 American Institute of Physics.