  We study the correlation between the neutrino oscillation and the
production/decay of the lightest supersymmetric particle(LSP) in the context of
the minimal supergravity model(mSUGRA) without R-parity. We show how the
neutrino masses and mixing which are consistent with the recent neutrino data
can be obtained in this model, and describe how to probe the model by observing
the LSP decay at collider experiments. It is shown that the generic 1-loop
contributions to neutrino masses are too small to account for the solar and
atmospheric neutrino oscillations and thus some fine cancellation in tree-level
contribution is required to severely constrain the viable parameter space. In
most parameter space of mSUGRA, the neutralino or the stau is LSP. Examining
both cases, we find that there is a simple correlation between the neutrino
mixing angles and the LSP branching ratios in the small $\tan\beta$ region so
that the model can be clearly tested in the future colliders. In the large
$\tan\beta$ region, such a correlation is obscured by the large tau Yukawa
contribution which makes it nontrivial to test the model.
