  We give a review about the Minimal Supersymmetric Standard Model with three
right-handed neutrinos (MSSM3RHN). We, first introduce the minimal set of
fields to built this model in their superfields formalism. After it, we build
the lagrangian of the model in the superspace formalism and also introduce the
soft terms to break SUSY. We show how to get masses to the neutrinos and
sneutrinos in this model.
