Exact S3 symmetry solving the supersymmetric flavor problem

The exact discrete flavor symmetry, S3 in the hadronic sector and S3×Z2 in the leptonic sector, which has been recently found, is introduced in a supersymmetric extension of the standard model. We investigate the supersymmetric flavor problem, and explicitly find that thanks to the flavor symmetry the dangerous FCNC processes and CP-violating phases are sufficiently suppressed.