To provide a memory storage device for allowing the existence of a memory card to be always recognized, not only when the memory card is attached/detached to/from a cellular phone, and preventing the card from being damaged when the card is carried or stored, etc.

The cellular phone includes a memory rack where the memory card is inserted and drawn freely. The memory rack for covering the memory card includes a window which penetrates the rack. Consequently, the memory card, stored in the memory rack, is viewed through the window, and the card is inserted/extracted freely with fingers through the window.