An information storage element includes a strip-shaped ferromagnetic material layer; a first electrode disposed at a first end of the ferromagnetic material layer; and a second electrode disposed at a second end of the ferromagnetic material layer, wherein a current-induced domain wall motion is caused by applying a current between the first electrode and the second electrode, in the ferromagnetic material layer, a magnetization state is written into a magnetization region as information or a magnetization state is read from a magnetization region as information, a magnetization direction in each magnetization region is parallel to a direction of the thickness of the ferromagnetic material layer, and at the time of writing information or reading information, a temperature distribution that monotonically decreases from the second end of the ferromagnetic material layer to the first end thereof is generated in the ferromagnetic material layer.