An optical disk drive, which includes a main frame, an upper case coupled to an upper portion of the main frame, a tray slidably installed on the main frame, having a door, and adapted to carry a disk, and a front panel coupled to a front end portion of the main frame and having an aperture through which the tray passes, including an air discharging passage between the main frame and the front panel to discharge air and dust introduced into the optical disk drive through a gap between the door and the front panel to an outside of the optical disk drive.