An actuator locking apparatus of a hard disk drive locking an actuator using a magnetic force of a magnet attached to a first surface of a first yoke, with a metal piece installed at an end portion of an arm of the actuator, a contact portion protruding from a side surface of a second yoke, and bent such that an interval between a first contact surface of the contact portion facing the actuator and the actuator is greater than an interval between a second surface of the second yoke facing the actuator and the actuator, and a bending portion protruding from an edge of the first yoke and bent toward and extending to the contact portion, so that a second contact surface of an end portion of the bending portion contacts the first contact surface, and having a slot of predetermined width corresponding to the metal piece.