An electric motor control apparatus for a three phase AC electric motor, including: motor rotational angle detection means for calculating a rotational angle of the electric motor, a current detection circuit which is adapted to calculate currents flowing through respective phases of the electric motor, current control means for determining three phase voltage commands in accordance with a target q-axial current corresponding to a target value of a torque to be generated by the electric motor, and the detection currents of respective phases and the motor rotational angle from the current detection circuit and the motor rotational angle detection means, a switching-element drive circuit which is adapted to subject the three phase voltage commands from the current control means, to PWM modulation and which is adapted to give commands of switching operations to an inverter, wherein the inverter which receives switching operation signals from the switching-element drive circuit, is adapted to apply voltages to the respective phases of the electric motor and causes currents to flow therethrough; the electric motor control apparatus characterized in that the current control means comprises; normal-mode current control means for use in a normal mode, separate abnormal-mode current control means for use in an abnormal mode, abnormality decision means for detecting an abnormal state of the electric motor or the inverter, and changeover means for selecting either the output from the normal-mode current control means or the output from the abnormal-mode current control means on the basis of a command from the abnormality decision means and providing this to the switching element drive circuit, wherein, in case of a single phase open phase fault of the electric motor or the inverter, the abnormal-mode current control means is selected by the changeover means, and abnormal-mode three phase voltage commands generated by the abnormal-mode current control means are set as the three phase voltage commands for the switching-element drive circuit and provided thereto; wherein the abnormal-mode current control means are adapted to generate the voltage commands of the respective phases so as to satisfy a balanced condition in which a sum of the voltage commands of the normal phases except the phase undergoing the abnormality becomes zero, thereby to output the generated voltage commands as the abnormal-mode three phase voltage commands. motor rotational angle detection means for calculating a rotational angle of the electric motor, a current detection circuit which is adapted to calculate currents flowing through respective phases of the electric motor, current control means for determining three phase voltage commands in accordance with a target q-axial current corresponding to a target value of a torque to be generated by the electric motor, and the detection currents of respective phases and the motor rotational angle from the current detection circuit and the motor rotational angle detection means, a switching-element drive circuit which is adapted to subject the three phase voltage commands from the current control means, to PWM modulation and which is adapted to give commands of switching operations to an inverter, wherein the inverter which receives switching operation signals from the switching-element drive circuit, is adapted to apply voltages to the respective phases of the electric motor and causes currents to flow therethrough; the electric motor control apparatus characterized in that the current control means comprises; normal-mode current control means for use in a normal mode, separate abnormal-mode current control means for use in an abnormal mode, abnormality decision means for detecting an abnormal state of the electric motor or the inverter, and changeover means for selecting either the output from the normal-mode current control means or the output from the abnormal-mode current control means on the basis of a command from the abnormality decision means and providing this to the switching element drive circuit, wherein, in case of a single phase open phase fault of the electric motor or the inverter, the abnormal-mode current control means is selected by the changeover means, and abnormal-mode three phase voltage commands generated by the abnormal-mode current control means are set as the three phase voltage commands for the switching-element drive circuit and provided thereto; wherein the abnormal-mode current control means are adapted to generate the voltage commands of the respective phases so as to satisfy a balanced condition in which a sum of the voltage commands of the normal phases except the phase undergoing the abnormality becomes zero, thereby to output the generated voltage commands as the abnormal-mode three phase voltage commands.