Memory element and memory device

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A memory element in which data recording and data readout can be performed stably without difficulties and which can be manufactured with a comparatively simplified method is provided. The memory element 10 includes a memory layer 4 and an ion source layer 3 positioned between the first electrode 2 and the second electrode 6, in which the ion source layer 3 contains any of elements selected from Cu, Ag, Zn and any of elements selected from Te, S, Se, and the ion source layer further contains boron (or rare-earth elements and silicon).