PROBLEM TO BE SOLVED: To provide a visual line detection device that can correctly detect a pupil center, and can correctly detect a view point of a subject.SOLUTION: A visual line detection device comprises: a light source that irradiates an eyeball of a subject with detection light； a location detection unit that detects a location of a pupil center indicative of a center of a pupil of left/right respective eyeballs and a location of a cornea reflection center indicative of a center of a cornea reflection from an image of the eyeball irradiated with the detection light； a curvature-of-radius calculation unit that calculates a curvature of radius of the cornea of left/right respective eyeballs from a location of the light source and the location of the cornea reflection center； a view point detection unit that detects a view point of the left/right respective eyeballs from the location of the pupil center and the curvature of radius of the cornea； an extraction unit that extracts a pupil parameter indicative of a size of the left/right respective eyeballs from the image of the eyeball； and a correction unit that corrects the view point of the left eyeball and the view point of the right eyeball on the basis of the pupil parameter to calculate a synthesis view point.SELECTED DRAWING: Figure 6【課題】瞳孔中心を正確に算出して被験者の視点を正確に検出できる視線検出装置を提供する。【解決手段】視線検出装置は、被験者の眼球に検出光を照射する光源と、検出光が照射された眼球の画像から、左右それぞれの眼球の瞳孔の中心を示す瞳孔中心の位置と角膜反射の中心を示す角膜反射中心の位置とを検出する位置検出部と、光源の位置と角膜反射中心の位置とから、左右それぞれの眼球の角膜曲率半径を算出する曲率半径算出部と、瞳孔中心の位置と角膜曲率半径とから、左右それぞれの眼球の視点を検出する視点検出部と、眼球の画像から、左右それぞれの眼球の瞳孔の大きさを示す瞳孔パラメータを抽出する抽出部と、左の眼球の視点と右の眼球の視点とを瞳孔パラメータに基づいて補正して合成視点を算出する補正部と、を備える。【選択図】図６
