Search for dark particles and dark sector at belle

We search for dark photon A0 and the dark Higgs boson h' particles that are suggested in number of recently proposed dark sector models. We present our search results in the production of e⁺e^- →A'h' with the decay mod of h' →A'h'. The search was carried out in both inclusive and exclusive modes. We also discuss a search for new dark vector gauge boson that couples to light quark predominantly.