We propose a minimally extended gauge symmetry model with U(1)R, where only the right-handed fermions have nonzero charges in the fermion sector. To achieve both anomaly cancellations and minimality, three right-handed neutrinos are naturally required, and the standard model Higgs has to have nonzero charge under this symmetry. Then we find that its breaking scale(Λ) is restricted by precise measurement of neutral gauge boson in the standard model; therefore, O(10)?TeV?Λ. We also discuss its testability of the new gauge boson and discrimination of U(1)R model from U(1)B?L one at collider physics such as LHC and ILC.
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