A display controlling device comprising: a display unit for displaying an image; a light emitter being provided in a periphery of the display screen of the display unit; an operation unit including an imaging sensor for capturing a light image being emitted from a light emitter toward front of a display screen, the operation unit being arranged for a user to hold and operate, a processing device having an input unit and a processor, the input unit being configured to receive a signal being output from an operation unit,, the signal being based on an image captured by the imaging sensor,, the processor being configured to acquire, every predetermined period, information about a position of an intersection based on the signal input at the input unit, the intersection being produced by a plane including the display screen of the display unit and an optical axis of the imaging sensor; determine, every predetermined period, whether the intersection is located inside the display screen of the display unit based on the information about the position of the intersection acquired by the intersection position acquirer; and display a cursor at the position of the intersection on the display screen of the display unit if the determiner determines that the intersection is located inside the display screen; characterized in that the processing device presents a first notifier if it is determined that the intersection is not located inside the display screen, first notifier indicating that the intersection is located outside the display screen and also indicating information about a direction in which the user should move the intersection. a display unit for displaying an image; a light emitter being provided in a periphery of the display screen of the display unit; an operation unit including an imaging sensor for capturing a light image being emitted from a light emitter toward front of a display screen, the operation unit being arranged for a user to hold and operate, a processing device having an input unit and a processor, the input unit being configured to receive a signal being output from an operation unit,, the signal being based on an image captured by the imaging sensor,, the processor being configured to acquire, every predetermined period, information about a position of an intersection based on the signal input at the input unit, the intersection being produced by a plane including the display screen of the display unit and an optical axis of the imaging sensor; determine, every predetermined period, whether the intersection is located inside the display screen of the display unit based on the information about the position of the intersection acquired by the intersection position acquirer; and display a cursor at the position of the intersection on the display screen of the display unit if the determiner determines that the intersection is located inside the display screen; characterized in that the processing device presents a first notifier if it is determined that the intersection is not located inside the display screen, first notifier indicating that the intersection is located outside the display screen and also indicating information about a direction in which the user should move the intersection.