  The large amount of data accumulated at LEP2 by the ALEPH experiment has been
used to search for supersymmetric particles. No signal has been found therefore
limits have been determined. Within the Constrained Minimal Supersymmetric
Standard Model, the constraints from direct SUSY searches of charginos,
sleptons and neutralinos, are combined to extract a lower limit on the mass of
the neutralino considered to be the Lightest Supersymmetric particle. An
improved limit is obtained when the limit on the Higgs mass is included.
Neutralino masses up to 38 GeV/c^2 are excluded at 95 % confidence level.
