We report the construction and operation of a self‐contained electrophoretic x‐ray image cell which, between two transparent‐electrode coated glass plates, has an electrophoretic liquid in direct contact with radioconductive amorphous selenium. The image cell has a built‐in memory which holds the x‐ray image after a transitory x‐ray exposure. The x‐ray image can be developed and erased, without handling the liquid toner or radioconductive material. Potential applications include radiography, mammography, and x‐ray inspection of baggages, mail, industrial products, and machines.