A resistive memory structure including at least one reactive layer, at least one electrode, and at least one resistance-changing material is provided. The reactive layer extends along a first direction and a second direction. The electrode extends at least along a third direction, wherein the first direction, the second direction, and the third direction are different from each other. At least part of the resistance-changing material is disposed between the reactive layer and the electrode. When ions diffuse from the resistance-changing material to the reactive layer or from the reactive layer to the resistance-changing material, resistance of the resistance-changing material changes.