In the SM, the semileptonic decay B → D(*) tau nu proceeds via a tree-level process with an intermediate W boson. The charged Higgs boson in supersymmetry or two-Higgs doublet models might give a significant contribution to this decay due to large mass of tau lepton. Although the branching fractions of these decays are a few percent level, it is not so easy to detect them due to the multiple neutrinos in final state. B → D* tau nu decay was first observed by Belle collaboration. Since then, Belle, BaBar, and LHCb have improved the measurements of the branching fraction of these decays using various analysis techniques. In this talk, I will present current situation on B → D(*) tau nu measurements and discuss upcoming results in future.