The standard model of particle physics does not predict sizable branching ratios of the Higgs boson to invisible final states. Nevertheless, a variety of models exist that predict branching ratios of up to 100\% to invisible final states. Several experimental signatures can be used to search for an invisibly decayed Higgs boson. Searches carried out in the CMS and in the ATLAS collaboration will be reviewed.

PACS numbers: 14.80.Bn, 14.80.Cp