Search for neutrinoless double beta decay with CUORICINO and prospects for CUORE

CUORICINO is a cryogenic detector running in Gran Sasso National Laboratory, Italy, since 2003. With its 40.7 kg mass of TeO2 mass, in the form of an array of 62 crystals, it has proven the feasibil- ityof the CUOREexperiment, whose aim is to be sensitive to the effective neutrino mass as low as a few tens of meV. It has moreover set the current lower limit on the lifetime of 130 Te for neutrinoless double beta decay: we report on the up-to-date CUORICINO results and discuss the prospects for CUORE.