To improve operability of figure key input in a title search, a chapter search, a track search, and a time search mode in an optical disc apparatus, for example, the quantity number of titles and the quantity number of digits thereof are detected from an optical disc. When a figure for title search is inputted, if this figure exceeds a figure included in the ten's digit of the quantity number of titles, this figure is considered as a figure in the one's digit for search. If the figure for search is equal to or smaller than the figure in the ten's digit of the quantity number of titles, the figure inputted for search is registered as a figure in the ten's digit. Subsequently, if the figure for search is smaller than the figure in the ten's digit of the quantity number of titles, a figure in the one's digit for search within a range from 0 to 9 is inputted and registered. If the figure for search is equal to the figure in the ten's digit of the quantity number of titles, a figure inputted in the one's digit for search, which is limited to a figure equal to or smaller than the figure in the one's digit of the quantity number of titles, is inputted and registered.