Abstract: To share short-term future schedules of the user and others used in mobile terminal devices by using social networking services. The information sharing system includes an information sharing server, an information sharing server database connected to the information sharing server and saves schedule data, and a mobile terminal device including a control unit, a display device, an input device, a storage device, and a communication device, wherein: the control unit acquires into the storage device the schedule data for a plurality of days and people from the information sharing server database connected to the information sharing server via the communication device and the communication network, and displays the acquired schedule data on a display screen of the display device with a tile screen; and the tile screen displayed on the display screen is scrolled in lateral and vertical directions by operating the input device for display.