The rare earth piperidinocarbodithioate complexes with the general formulas(PipH)[RE(PipCS)]·xHO(Pip=piperidino,RE=Y,Tb~Er,x=2.6)and RE(PipCS)Cl·2HO(RE=Tm,Yb)have been pre-pared by using anhydrous rare earth chloride and piperidinium piperidinocarbodithioate as reactants under drynitrogen atmosphere.They have been characterized by elemental analyses,IR spectra,conductivity measurementand TG-DTA technique.The results show that in the complexes the ligands coordinate to RE ion through twosulphur atoms.