a disk recording and reproducing device includes a chassis , a disk holder movably mounted on the chassis for holding an information storage disk , an eject lever slidably mounted on the chassis , a side panel mounted on the chassis , an ejector button mounted on the chassis for actuating the eject lever , a slide member slidably mounted on the side panel substantially parallel to the eject lever and actuatable in response to sliding movement on the eject lever for substantially vertically moving the disk holder between unload and load positions , the eject lever having an engagement tongue projecting toward and engaging the slide member in a direction across the direction in which the slide member is slidable .