The MSSM(Minimal Supersymmetric Standard Model) provides a realistic
model that incorporates both supersymmetry and the SM(Standard Model)
along with a great predictive power. However it suffers from a
fine-tuning problem, known as mu-problem. This can be most naturally
resolved by an additional TeV-scale U(1) gauge symmetry [U(1)']. The
U(1)'-extended MSSM has distinctive predictions associated with the Z'
boson at the TeV-scale and the extra singlet Higgs that breaks the
symmetry spontaneously. I will present interesting physics consequences
of this model.