Product information display apparatus

A device for displaying product information is provided to enable a user to check authenticity of a product with a simple and portable structure by inserting an RFID(Radio Frequency IDentification) tag into the product in manufacturing, and informing the user of the product information stored in the product when the product approaches a tag reader. An RF communicator(230) receives product information from an external RFID(Radio Frequency IDentification) tag(210) storing the product information when a product(200) embedded with the RFID tag is approached. A flexible display unit(260) is inserted into a card type body(220) to display the product information. A controller(250) outputs the product information received from the RF communicator to the flexible display unit. The RF communicator and the controller are embedded in the card type body. The product information includes ID information of the product attached with the RFID tag and is an encrypted signal. A memory(240) stores an encryption algorithm, and the controller decrypts and displays the product information when an encrypted signal satisfies the encryption algorithm.