After the discovery of the Higgs boson, the precision measurements of its properties
and comparison of results to those predicted by the Standard Model (SM) became the crucial
part of the LHC physics programme. Potential observation of deviations may lead to the
discovery of a new physics beyond the Standard Model (BSM). In this contribution, the results of
analyses of the Higgs boson properties in H->ZZ*->4l decay channel are presented. The
measurements of Higgs SM couplings, fiducial and differential cross sections with
36.1 fb -1 of data collected by ATLAS at sqrt s = 13 TeV are shown. The observed limits on BSM
tensor structure of Higgs couplings to SM bosons and fermions are also discussed.