Double beta decay experiments with thermal detectors

Massive low temperature particle detectors and their possible impacts on se arches for neutrinoless double beta decay (0v-DBD) are presented and discus sed. In particular, the experimental work of the Milano group is described. Special relevance is given to the present status of the search for ov-DBD of Te-130 and to the possible expansion of this experiment in the near futu re. The most recent results obtained by the Milano-Gran Sasso collaboration with a 20 bolometer array are presented. On the basis of these results, th e construction of a 42 kg array consisting of 56 TeO2 bolometers (CUORICINO project), to extend the sensitivity of the present experiment, has been pr oposed. CUORICINO should represent also a feasibility test for a large arra y of 1000 bolometers (CUORE project) aiming at the search for neutrinoless Double Beta Decay, Cold Dark Matter and Solar Axions with extremely high se nsitivity.