  We present a semiclassical gravity in the framework of the double scale
theory, a new interpretation of quantum mechanics which expands on the de
Broglie-Bohm (dBB) theory. In this interpretation, any quantum system is
associated with two wave functions, one external and one internal. The external
wave function drives the center-of-mass, as in the dBB theory, and spreads with
time. The internal wave function corresponds to the density of an extended
particle. It remains confined in space and its average position corresponds to
the center of mass of the particle. We define, for an N-body system, new
semi-classical gravity equations called Einstein-de Broglie equations. The
external wave function of each body depends only on the internal wave functions
of the N--1 others. They are deduced from Einstein's semi-classical equation by
using the internal wave functions instead of the usual wave function. If we
restrict to the dBB interpretation, we find the Newton-de Broglie equations
that Struyve and Lalo{\"e} have recently proposed independently. We show that
the Newton-de Broglie and Einstein-de Broglie equations converge to Newton's
gravity when h $\rightarrow$ 0, which gives a theoretical validation.
