PROBLEM TO BE SOLVED: To provide an authentication device that can capture an image with an influence of a light source less affected.SOLUTION: An authentication device includes a prism body, an imaging unit and a visible light source that irradiates a living body with visible light, in which the prism body is configured to have a substantially trapezoidal and be formed into an end-spread shape at least in one side surface toward a direction of an imaging surface parallel to a living body authentication surface, on which an authentication part of the living body is placed, from the living body authentication surface, and the visible light source is configured to be disposed below the imaging surface and in the vicinity of a side of the end-spread side of the imaging surface, and the imaging unit is configured to be disposed below the imaging surface.【課題】光源の影響少ない画像を撮像することができる認証装置を提供すること。【解決手段】プリズム体と、撮像部と、生体に可視光を照射する可視光源とを有し、プリズム体は概台形状であり、生体の認証部分が設置される生体認証面から、生体認証面と平行な撮像面の方向に向かって、少なくとも一側面において末広がりの形状に形成されており、可視光源は、撮像面の下部、かつ、撮像面の末広がり側の辺の近傍に配置され、撮像部は、撮像面の下部に配置される認証装置である。【選択図】図３
