The object at which a user is gazing is accurately determined from among objects displayed on a screen. A gaze target determination device (10) includes: an event setting unit (13) which generates, for each object at different times, a display event which triggers a movement of the gaze direction of the user who is gazing at the object and which indicates a movement or a change of the object a gaze trajectory calculation unit (12) which calculates a gaze trajectory based on the detected users gaze direction an eye movement event detection unit (14) which detects event detection time which is time at which the gaze direction moves according to the display event, based on the calculated gaze trajectory a synchronization structure analysis unit (15) which calculates, for each object, time difference between the event detection time and event occurrence time and a gaze target determination unit (16) which determines the object at which the user is gazing from among the objects, based on the calculated time difference.
