A motor control method includes a determination step of determining whether a contact portion exists, which is a portion where the screw and the nut member are in contact with each other at a location different from a mating portion, when the motor is energized to move the nut member in a first direction, and when the contact portion is determined to exist in the determination step, a return step of energizing the motor to move the nut member in a second direction opposite to the first direction until the contact portion no longer exists.