  A new supersymmetry is proposed for hadrons containing a single heavy quark.
This supersymmetry is based on a new approximation to those hadrons, which we
would consider as a further step beyond the spectator light diquark model of
baryons. The heavy diquark effective theory is constructed by the techniques
introduced in a different context by Georgi and Wise$^1$ and by Carone$^2$.
This theory can be incorporated into a supersymmetric theory together with
Heavy Quark Effective Theory, and leads to a common universal Isgur-Wise
function for mesons and baryons./.

High Energy Physics - Phenomenology