  We review the general gauged N=2 supergravity coupled to an arbitrary number
of vector multiplets and hypermultiplets. We consider two different models
where N=2 supersymmetry is broken to N=1 spontaneously, one has a U(1) vector
multiplet and the other has a U(N) vector multiplet. In both cases, partial
breaking of N=2 supersymmetry is accomplished by the Higgs and the super-Higgs
mechanisms. The mass spectrum can be evaluated and we conclude that the
resulting models have N=1 supersymmetry. This is based on master thesis
submitted to Graduate School of Science, Osaka City University, in March 2006.
