To search image information regarding image data, recorded on a storage medium, based on a desired search condition and to perform efficient display. An attribute-information obtaining section 221 obtains attributes. For respective chapters, the attributes are held by an attribute file 500. A condition searching section 223 searches the attributes for the respective chapters in accordance with a condition input from a condition inputting section 222. A thumbnail obtaining section 224 obtains thumbnails that match the search condition. An index displaying section 226 displays the obtained thumbnails. When a thumbnail is selected via an image selecting section 227, an image reproducing section 228 reproduces image data in accordance with link information extracted by a link-information extracting section 225.