A hard disk drive includes a base, an actuator arm pivotably installed on the base, and a latch device to latch the actuator arm at a parking position. The latch device includes a latch stop that protrudes from a side wall of the base and has an inclined surface, and a latch lever pivotably installed on the base and contacts and slides along the inclined surface of the latch stop during the rotation in an unlatching direction.