An eye image taking device comprises: an imaging unit for taking the eye of a person to be authenticated, as an eye image; an illumination unit for illuminating the eye of the person to be authenticated; an eyeglass reflection detecting unit for detecting an eyeglass reflection from the eye image; and an instruction unit for instructing the person to be authenticated the movement of the imaging unit or the direction of the face of the person to be authenticated, in case an eyeglass reflection detecting portion detects the eyeglass reflection.