Search for non-standard and rare decays of the Higgs boson with the ATLAS detector

Results of the latest searches for non-standard and rare decays of the Higgs boson with the ATLAS detector are presented. Good agreement is observed between data and the SM predictions in all searches, and the resuls are translated into upper limits on the branching fraction for the Higgs boson decaying into a $\phi$ meson and a photon, on the Higgs production cross-section times the branching fraction for the Higgs to decay into four $b$-quarks via two new light spin-0 particles, and on the branching fraction for Higgs decaying into an electron or a muon and a tau lepton.