  The microquasar 1E 1740.7-2942 is observed with Integral since Spring 2003.
Here, we report on the source high energy behaviour by using the first three
years of data collected with SPI and IBIS telescopes, taking advantage of the
instruments complementarity. Light curves analysis showed two main states for
1E 1740.7-2942: the canonical low/hard state of black-hole candidates and a
``dim'' state, characterised by a ~ 20 times fainter emission, detected only
below 50 keV and when summing more than 1Ms of data. For the first time the
continuum of the low/hard state has been measured up to ~ 600 keV with a
spectrum that is well represented by a thermal Comptonization plus an
additional component necessary to fit the data above 200 keV. This high energy
component could be related to non-thermal processes as already observed in
other black-hole candidates. Alternatively, we show that a model composed by
two thermal Comptonizations provides an equally representative description of
the data: the temperature of the first population of electrons results as
(kTe)_1 ~ 30 keV while the second, (kTe)_2, is fixed at 100 keV.
  Finally, searching for 511 keV line showed no feature, either narrow or
broad, transient or persistent.
