A fabricating method of a resistive random access memory unit with one-way conduction characteristic includes performing an initializing step, a forming step and a reverse resetting step. The initializing step includes providing the resistive random access memory unit. The forming step includes applying a setting voltage on a lower metal layer, and coupling an upper metal layer to a ground voltage to transform the resistive random access memory unit to a low resistive state. The reverse resetting step includes coupling the lower metal layer to the ground voltage and applying a resetting voltage to the upper metal layer to transform the resistive random access memory unit to a one-way conduction state. A forward reading current is greater than a reverse reading current, and the forward reading current is less than 3000 times of the reverse reading current. |