  We construct a supersymmetric left-right model in four dimension with
gauge-Higgs unification starting from a SU(3)_c x SU(4)_w x U(1)_{B-L} gauge
symmetry in five dimension. The model has several interesting features, such
as, the CKM mixings in the quark sector are naturally small while for the
neutrino sector it is not, light neutrino masses can be generated via the
seesaw mechanism in the usual way, and the model has a U(1)_R symmetry which
naturally forbid dimension five proton decay operators. We also discuss the
grand unification of our model in SO(12) in five dimensions.
