Speaker: dr hab. Michał Bluj Title: Higgs boson properties with H→ττ decays using the CMS detector Abstract: After discovery of the Higgs boson its properties are successively probed by LHC experiments. Measurements with the H→ττ decay channel play an important role in this programme. In this talk recent measurements preformed by the CMS experiment with the H→ττ channel will be discussed: a measurement of the Higgs boson production cross-section and measurements of the CP structure of the Higgs boson couplings.