Supersymmetry searches at LEP

This article summarizes the latest and preliminary results about supersymmetry (SUSY) searches at LEP. The data used to perform the different searches has been taken by the four LEP experiments: ALEPH, DELPHI, L3 and OPAL, from 1995 to 1998 at the centerof- mass energies from 130 to 189 GeV. The article presents the results obtained within the framework of gravity-mediated and gauge-mediated SUSY breaking models. There are no excess of supersymmetric signals in data, therefore the article presents a selection of the latest results on excluded masses for the supersymmetric particles.