To further reduce possibility for contamination by foreign materials such as dusts through shielding a card carrier and a start card from external air at the time other than that for loading and unloading card and disk by providing a door which can rotate in accordance with the movement of card carrier to outside or inside.

When the loaded card or disk is unloaded or when a card or disk is newly loaded, a shaft gear 122 inserted in direct to a drive motor shaft is driven by depression of a tact switch and a driving force is transferred to a couple of lacks 43 via a pair of side gears 133. Simultaneously, a rotating force of the drive gear 132 causes a pair of male hook and coupling hook 50 to rotate to raise a door member 30 to open a box aperture 21. As a result, a card carrier 40 goes forward with rotation of a pinion 143, a card and disk inserting slot is projected to the outside of front panel from the aperture 21 and thereby the card and disk can easily be unloaded.