Apparatus controlling a permanent magnet rotary electric machine. After the apparatus controls a current control portion, when a rotor of the machine rotates at a constant speed, to supply a predetermined current to an armature, the apparatus performs a dq vector control process by determining a predetermined temporarily set value as a magnetic pole position correction quantity while a d-axis current command value and a q-axis current command value in the dq vector control process performed on a dq coordinate system that has a d-axis extending in the direction of a magnetic field of the permanent magnet of the rotor and a q-axis extending in a direction perpendicular to the d-axis. Then, the apparatus obtains the magnetic pole position correction quantity based on a predetermined operation expression using the d-axis voltage command value and the q-axis voltage command value from the dq vector control process.