  We propose a simple model of dynamical supersymmetry breaking in the context
of minimal supergravity with gauged $U(1)_R$ symmetry. The model is based on
the gauge group $SU(2) \times U(1)_R$ with three matters. Since the $U(1)_R$
symmetry is gauged, the Fayet-Iliopoulos D-term appears due to the symmetry of
supergravity. On the other hand, the superpotential generated dynamically by
the SU(2) gauge dynamics leads to run away potential. Since the supersymmetric
vacuum condition required by the D-term potential contradicts the one required
by the superpotential, supersymmetry is broken. The supersymmetry breaking
scale is controlled by the dynamical scale of the SU(2) gauge interaction. We
can choose the parameters in our model for vanishing cosmological constant. Our
model is phenomenologically viable with the gravitino mass of order 1 TeV or 10
TeV.
