Strong gravity and supersymmetry

We construct a supersymmetric theory for a strong f- plus a weak g-graviton, together with their accompanying massive gravitinos, by gauging the graded OSp(2, 2, 1) × OSp(2, 2, 1) structure. The mixing term between f- and g-fields, which makes the strong graviton massive, can be introduced through a spontaneous symmetry-breaking mechanism implemented in this paper by constructing a non-linear realization of the symmetry group.