Abstract: A disk clamp to fix a disk to a hub of a spindle motor in a hard disk drive, and a hard disk drive having the disk clamp. The disk clamp can include a coupling hole formed at a center of the disk clamp, in which a clamping screw is inserted, at least one through hole formed outside the coupling hole, and a pressing portion provided at an outer circumferential side of the disk clamp to contact and press the disk. A particular area around the at least one through hole that is away from the at least one through hole can have a sectional thickness thinner than a predetermined area that is adjacent to the at least one through hole, to prevent stress distribution generated at a contact surface between the pressing portion and the disk from being irregular due to the at least one through hole.