  We present the study of the possibility to have R-parity breaking
interactions in minimal SU(5). An interesting scenario emerges in which the
R-parity breaking coupling $\lambda'_{333}$ is large, and its size is related
to the value of the tau neutrino mass, assuming that supersymmetry is broken
according to low energy supergravity framework. This scenario may also have
implications on the issue of $b-\tau$ unification.
