The object is to provide a display apparatus which keeps information security within a specific area, while ensuring its portability and rewritability. A display apparatus includes a display unit (11) configured to display information without a power supply; an area identifying unit (16) configured to determine whether the display apparatus is inside a permission area (9) where a read of the information displayed on the display unit (11) is permitted; and a data controller (14) configured to delete the information displayed on the display unit (11) or to display other information on the display unit (11), when the area identifying unit (16) determines that the display apparatus has moved from the inside of the permission area (9) to the outside of the permission area (9).