An information processing device includes an eyeball information acquisition section, a sightline estimation section, a display control section, a gesture information acquisition section, and a mode switching section. The eyeball information acquisition section acquires position and posture information of eyeballs of a user from a first sensor. The sightline estimation section estimates a sightline vector on the basis of the position and posture information of the eyeballs. The display control section controls a display device in such a manner that the display device displays a guide image for showing a gaze state based on the sightline vector. The gesture information acquisition section acquires gesture information, which is different from the position and posture information of the eyeballs, from a second sensor. The mode switching section switches between a first mode and a second mode according to mode switching input provided by the user with regard to the guide image, the first mode being a mode of reflecting the position and posture information of the eyeballs in the guide image, the second mode being a mode of correcting the gaze state on the basis of the gesture information.