<p>An object is to provide an optical disc device which has a simple mechanism for identifying the kind and insertion state of an optical disc so that the optical disc can be ejected when there is abnormality. When storage of an optical disc 12 in which information has been recorded is started, a pair of rollers 14 and 14 rotate while holding the optical disc 12 inserted through an insertion/ejection slot 11 of a body 13 of an optical disc device 10, so that the rollers 14 and 14 convey the optical disc 12 to the inside of the body 13. On this occasion, circumferential edge sensing units 20 provided in the inside of the body 13 sense a circumferential edge 12a of the inserted optical disc 12 continuously to thereby sense the outer diameter, shape and insertion state of the inserted optical disc 12. The optical disc 12 is ejected when decision is made that there is abnormality.</p>
