  The microquasar 1E 1740.7-2942 is one of the most appealing source of the
Galactic Centre region. The high energy feature detected once by SIGMA has been
searched in the last years by INTEGRAL, but never confirmed. Classified as a
persistent source, on 2004 it showed a quiescent-like state. In fact for few
month 1E 1740.7-2942 was below the detector sensitivity level. We present the
long term temporal behaviour of 1E 1740.7-2942 observed by INTEGRAL and RXTE in
2004 and 2005, as well as preliminary results on possible spectral transitions.
