An information presentation system comprising: a mobile terminal adapted to display a screen image, provided by an image data which is produced, on a mobile display portion; and an in-vehicle apparatus, which is fixed to a vehicle or mounted on the vehicle to be portable, wherein the mobile terminal includes a mobile communicator for communicating with the in-vehicle apparatus, and a mobile operation input portion, to which an operation input is performed by a user, wherein the in-vehicle apparatus includes a vehicle communicator for communicating with the mobile terminal, and a vehicle operation input portion, to which the operation input is performed by the user, the information presentation system being adapted to establish a communication between the in-vehicle apparatus and the mobile terminal, and send the image data from the mobile terminal to the in-vehicle apparatus, wherein a vehicle display portion of the in-vehicle apparatus is adapted to display the screen image, provided by the image data, characterized in that in a case where the communication between the in-vehicle apparatus and the mobile terminal has been established, only one of the mobile terminal or the in-vehicle apparatus, in which the operation input has been performed prior to the other of the mobile terminal or the in-vehicle apparatus, is operable when the one of the mobile terminal or the in-vehicle apparatus, in which the operation input has been performed prior to the other of the mobile terminal or the in-vehicle apparatus, is in operation, wherein, in a case where the communication between the in-vehicle apparatus and the mobile terminal has been established, the in-vehicle apparatus is inoperable and the mobile terminal is operable when the vehicle is in driving. a mobile terminal adapted to display a screen image, provided by an image data which is produced, on a mobile display portion; and an in-vehicle apparatus, which is fixed to a vehicle or mounted on the vehicle to be portable, wherein the mobile terminal includes a mobile communicator for communicating with the in-vehicle apparatus, and a mobile operation input portion, to which an operation input is performed by a user, wherein the in-vehicle apparatus includes a vehicle communicator for communicating with the mobile terminal, and a vehicle operation input portion, to which the operation input is performed by the user, the information presentation system being adapted to establish a communication between the in-vehicle apparatus and the mobile terminal, and send the image data from the mobile terminal to the in-vehicle apparatus, wherein a vehicle display portion of the in-vehicle apparatus is adapted to display the screen image, provided by the image data, characterized in that in a case where the communication between the in-vehicle apparatus and the mobile terminal has been established, only one of the mobile terminal or the in-vehicle apparatus, in which the operation input has been performed prior to the other of the mobile terminal or the in-vehicle apparatus, is operable when the one of the mobile terminal or the in-vehicle apparatus, in which the operation input has been performed prior to the other of the mobile terminal or the in-vehicle apparatus, is in operation, wherein, in a case where the communication between the in-vehicle apparatus and the mobile terminal has been established, the in-vehicle apparatus is inoperable and the mobile terminal is operable when the vehicle is in driving.