Littlest Higgs (LH) model predicts the existence of the doubly charged scalars Φ^±±, which generally have large flavor changing couplings to leptons. We calculate the contributions of Φ^±± to the lepton flavor violating (LFV) processes l_i→ l_jγ and l_i→ l_jl_kl_k, and compare our numerical results with the current experimental upper limits on these processes. We find that some of these processes can give severe constraints on the coupling constant Y_ij and the mass parameter M_Φ. Taking into

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... count the constraints on these free parameters, we further discuss the possible lepton flavor violating signals of Φ^±± at the high energy linear e^+e^- collider (ILC) experiments. Our numerical results show that the possible signals of Φ^±± might be detected via the subprocesses e^±e^±→ l^±l^± in the future ILC experiments.