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We show that R-parity violating decay of Wino dark matter of mass \sim 3 TeVcan naturally account for the flux and spectral shape of the cosmic-rayelectrons and positrons observed by the PAMELA and Fermi satellites. To providea theoretical basis for the scenario, we also present a model that trilinearR-parity breaking appears with a coefficient suppressed by powers of thegravitino mass, which naturally leads to the Wino lifetime of O(10^26) sec.

R-violating Decay of Wino Dark Matter and electron/positron Excesses in the PAMELA/Fermi Experiments