An optical disk apparatus for recording information on an optical disk or for reproducing information recorded on an optical disk, wherein previews corresponding to respective titles or chapters of information recorded on an optical disk are displayed and reproduced on a display device. The apparatus includes: a system controller which compares a target title or chapter with a comparison reference title or chapter during reproduction of a preview corresponding to the target title or chapter, and skips common scenes and reproduces subsequent information when the target title or chapter and the comparison reference title or chapter have common scenes.