A gaze detection device includes a display screen configured to display an image； a sound output device configured to output a sound； a gaze point detector configured to detect a position of a point of gaze of an observer observing the display screen； an area setting unit configured to set a specific area on the display screen or part of the image； a determination unit configured to, when the specific area is set on the display screen or the image, determine whether the point of gaze is within the specific area on the basis of a result of the detecting the position of the point of gaze； and an output controller configured to cause the display screen to display the image and cause the sound output device to output the sound and adjust at least a mode in which the sound is output.
