Hard disk device

The utility model provides a hard disk device comprising a casing, a storage module and a buffer element. The casing is provided with a containing space and a plurality of openings communicated with the containing space, and the storage module is configured in the containing space. The buffer element comprises a body and a plurality of buffer units. The body is configured in the containing space and is also positioned between the storage module and the openings. The buffer units are configured on the body. Moreover, the buffer units penetrate through the openings from the body and also protrude outside the casing. In the utility model, the hard disk device has the functions of buffering and protecting an inner element by the buffer element which is configured in the containing space and also protrudes outside the casing.