PROBLEM TO BE SOLVED: To improve the detection accuracy of a pupil image position in an image by stabilizing the brightness of an eye portion other than the pupil in the acquired image. SOLUTION: A pupil detection device 1 includes a camera 2, a light source 3A arranged at a position of a distance D1 from the center of an opening 8 of the camera 2, and a light source 3B arranged at a position of a distance D2 from the center of the opening 8. , The position of the pupil image of the subject is calculated based on the lighting control unit 12 that controls the lighting timing and the amount of light emission of the light sources 3A and 3B and the difference image between the bright pupil image and the dark pupil image, and the bright pupil image or The brightness value of the subject's iris is specified based on the dark pupil image, and based on this, the sum of the light emission amount of the light source 3A and the light emission amount of the light source 3B during the bright pupil acquisition period is controlled to be changed. It includes a detection unit 13 that controls to change the amount of light emitted from the light source 3B during the dark pupil acquisition period based on the brightness value of the iris. [Selection diagram] Fig. 1【課題】取得する画像中の瞳孔以外の眼部の輝度を安定化させることにより、画像中の瞳孔像位置の検出精度を向上させること。【解決手段】瞳孔検出装置１は、カメラ２と、カメラ２の開口部８中心から距離Ｄ１の位置に配置された光源３Ａと、開口部８中心から距離Ｄ２の位置に配置された光源３Ｂと、光源３Ａ，３Ｂの点灯タイミング及び発光量を制御する点灯制御ユニット１２と、明瞳孔画像と暗瞳孔画像との差分画像を基に対象者の瞳孔像の位置を算出するとともに、明瞳孔画像あるいは暗瞳孔画像を基に対象者の虹彩の輝度値を特定し、それを基に明瞳孔取得期間中の光源３Ａの発光量と光源３Ｂの発光量との和を変更するように制御するとともに、虹彩の輝度値を基に暗瞳孔取得期間中の光源３Ｂの発光量を変更するように制御する検出ユニット１３とを備える。【選択図】図１
