  While there exist various candidates, the identification of dark matter
remains unresolved. Recently it was argued that the generalized uncertainty
principle (GUP) may prevent a black hole from evaporating completely, and as a
result there should exist a Planck-size BHR at the end of its evaporation. We
speculate that the stability of BHR may be further protected by supersymmetry
in the form of extremal black hole. If this is indeed the case and if a
sufficient amount of small black holes can be produced in the early universe,
then the resultant BHRs can be an interesting candidate for DM. We demonstrate
that this is the case in the hybrid inflation model. By assuming BHR as DM, our
notion imposes a constraint on the hybrid inflation potential. We show that
such a constraint is not fine-tuned. Possible observational signatures are
briefly discussed.
