PROBLEM TO BE SOLVED: To provide a visual line detection device that can correctly detect a visual line direction as for various subjects.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 visual line detection unit that detects a visual line direction of the left/right respective eyeballs from the location of the pupil center and the curvature of radius of the cornea； a view point detection unit that detects a view point of the left/right respective eyeballs from the visual line direction detected by the visual line detection unit； an output control unit that causes a view point of the left/right respective eyeballs to be displayed on a display unit from the visual line direction detected by the visual line detection unit； and a determination unit that determines whether or not the left/right respective eyeballs direct at a target direction from the visual line direction detected by the visual line detection unit.SELECTED DRAWING: Figure 6【課題】様々な被験者について視線方向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線方向を検出する視線検出部と、視線検出部で検出された視線方向から、左右それぞれの眼球の視点を検出する視点検出部と、視線検出部で検出された視線方向から、左右それぞれの眼球の視点を表示部に表示させる出力制御部と、視線検出部で検出された視線方向から、左右それぞれの眼球が目標方向を向いているか否かを判定する判定部と、を備える。【選択図】図６
