Higgs boson decay into heavy quarks and heavy leptons: higher order corrections

Theoretical predictions for the decay width of Standard Model Higgs boson into bottom quarks and τ-leptons, in the case when MH⩽2MW, are briefly reviewed. The effects of higher order perturbative QCD (up to -level) and QED corrections are considered. The uncertainties of the decay width of Higgs boson into and τ+τ− are discussed.