Abstract: The present invention relates to a shockproof device of a hard disk drive in which a plurality of springs are mounted on slide rail seats at sides of hard disk drive of notebook computer in order that the hard disk drive is disposed in a hanging arrangement. Besides, the inner five sides (except the hard disk drive extraction side) of the hard disk drive housing are provided with shock-absorbing blocks for improving the shockproof function. In addition, two sides of the hard disk drive housing are fitted with the slide rail seats for the convenient extraction of the hard disk drive. Accordingly, a better shockproof effect is achieved.