  We report on the measurement of the two-neutrino double beta decay half-life
of $^{130}$Te with the CUORE-0 detector. From an exposure of 33.4 kg$\cdot$y of
TeO$_2$, the half-life is determined to be $T_{1/2}^{2\nu}$ = [8.2 $\pm$ 0.2
(stat.) $\pm$ 0.6 (syst.)] $\times$ 10$^{20}$y. This result is obtained after a
detailed reconstruction of the sources responsible for the CUORE-0 counting
rate, with a specific study of those contributing to the $^{130}$Te
neutrinoless double beta decay region of interest.
