In a case (101) with the shorter side at the top, a tray (121) is placed substantially vertically, an optical disk (170) is substantially vertically supported on the tray (121), and a printer section (135) is provided to be opposite to the tray (121). In the printer section (135), a carriage (141) equipped with a thermal head (142) is structured to be movable vertically along the tray (121). When the carriage (141) moved vertically downward, the thermal head (142) is driven to provide thermal transfer printing of a title and the like, which indicate the contents of data recorded on the optical disk (170), to the surface thereof through an ink ribbon (162).