A mounting data creating device which creates mounting data for producing a board while mounting a component on the board, comprising: a mounting head that has a suction nozzle for sucking the component, and that is configured to mount the component sucked by the suction nozzle on the board; a component setting table for setting the component to be mounted on the board; a first imaging device that is configured to image the component set on the component setting table, from above; a second imaging device that is configured to image the component sucked by the suction nozzle, from below; a robot that has a moving head for moving the mounting head relative to the board in an XY plane; a top shape data creating unit that is configured create top shape data of the component, based on top shape image data of the component which is imaged by the first imaging device; a suction nozzle positioning unit that is configured to position the suction nozzle at a component suction position by moving the robot, based on top shape data of the component which is created by the top shape data creating unit; a bottom shape data creating unit that is configured to create bottom shape data of the component, based on bottom shape image data of the component which is imaged by the second imaging device; a mounting position designation unit that is configured to designate a position for mounting the component on the board; and a mounting data creating unit that is configured to create the mounting data for mounting the component on the board, based on component data having top shape data and bottom shape data which are created by the top shape data creating unit and the bottom shape data creating unit, and data of the component mounting position designated by the mounting position designation unit. a mounting head that has a suction nozzle for sucking the component, and that is configured to mount the component sucked by the suction nozzle on the board; a component setting table for setting the component to be mounted on the board; a first imaging device that is configured to image the component set on the component setting table, from above; a second imaging device that is configured to image the component sucked by the suction nozzle, from below; a robot that has a moving head for moving the mounting head relative to the board in an XY plane; a top shape data creating unit that is configured create top shape data of the component, based on top shape image data of the component which is imaged by the first imaging device; a suction nozzle positioning unit that is configured to position the suction nozzle at a component suction position by moving the robot, based on top shape data of the component which is created by the top shape data creating unit; a bottom shape data creating unit that is configured to create bottom shape data of the component, based on bottom shape image data of the component which is imaged by the second imaging device; a mounting position designation unit that is configured to designate a position for mounting the component on the board; and a mounting data creating unit that is configured to create the mounting data for mounting the component on the board, based on component data having top shape data and bottom shape data which are created by the top shape data creating unit and the bottom shape data creating unit, and data of the component mounting position designated by the mounting position designation unit.