An image forming apparatus for authenticating a portable terminal by near field wireless communication with the portable terminal includes an image forming portion configured to form an image on a sheet, and an operating portion configured to receive an operation by an operator. The operating portion includes a display panel capable of displaying information on image formation in response to authentication of the portable terminal and includes therein an antenna for establishing the near field wireless communication with the portable terminal. The display panel is capable of displaying a guide screen for guiding an operator so as to hold the portable terminal over the display panel.