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In light of the recent observation of the Fermi-LAT 130 GeV gamma-ray line,we suggest a model of scalar dark matter in hidden sector, which can decay intotwo (hidden) photons. The process is radiatively induced by a GUT scale fermionin the loop, which is charged under a hidden sector U(1), and the kineticmixing ($\sim \epsilon F^{\mu\nu}F'_{\mu\nu}$) enables us to fit the requireddecay width for the Fermi-LAT peak. The model does not allow any dangerousdecay channels into light standard model particles.

Radiatively decaying scalar dark matter through U(1) mixings and the Fermi 130 GeV gamma-ray line