  Rare heavy flavor decays provide stringent tests of the Standard Model of
particle physics and allow to test for possible new Physics scenarios. The LHCb
experiment at CERN is the ideal place for these searches as it has recorded the
worlds largest sample of beauty mesons. The status of the rare decay analyses
with 1\invfb of $\sqrt s = 7\tev $ of $pp$--collisions collected by the LHCb
experiment in 2011 is reviewed. The worlds most precise measurements of the
angular structure of \BdToKstmm decays is discussed, as well as the isospin
asymmetry measurement in $\decay{B}{\kaon^{(*)} \mup\mun}$ decays. The most
stringent upper exclusion limit on the branching fraction of \Bsmm decays is
shown, as well as searches for lepton number and lepton flavor violating
processes.
