Disclosed is a disk label printer that includes a slot-in type optical disk driving mechanism and a printing mechanism integrated with each other, has a small size, and prints a high-quality image on the label surface of an optical disk. The disclosed disk label printer includes: a case that has a slot through which an optical disk is inserted or ejected formed therein; an optical disk driving mechanism that is provided in the case and writes and/or reads signals to and/or from the optical disk mounted to a disk mounting portion; and a printing mechanism that is provided in the case and includes a thermal head printing a desired image on a label surface of the optical disk. The printing mechanism is provided on a transfer path of the optical disk toward the optical disk driving mechanism between the slot an optical disk driving mechanism.