  We present a method to directly solving the Bethe-Salpeter equation in
Minkowski space, both for bound and scattering states. It is based on a proper
treatment of the singularities which appear in the kernel, propagators and
Bethe-Salpeter amplitude itself. The off-mass shell scattering amplitude for
spinless particles interacting by a one boson exchange is computed for the
first time.
