[Object] To enable to obtain a clear output image when a palm print is taken. [Solution Means] An FOP 1 includes a plurality of unit fibers 4 respective optical axes of which are approximately parallel to each other, and an input end surface 2 and an output end surface 3 configured by respectively assembling both end surfaces of the unit fibers. The FOP 1 has a conical shape having a height in the optical axis direction the input end surface 2 configures a side surface of the conical shape and the output end surface 3 configures a bottom surface of the conical shape. A light incident from the input end surface 2 is output from the output end surface 3 if a palm or the like of a photographic subject is brought into contact with the input end surface 2. The unit fiber 4 has a core 5 for propagating the light which is incident from the input end surface 2, a cladding 6 for covering an external periphery of the core 5, and a light absorbing body 7 for absorbing an incident light while covering an external periphery of the cladding 6. The input end surface 2 is inclined with respect to the optical axis of the core 5 and the angle of inclination is set so that the light incident from air into the core 5 does not generate total reflection at a boundary surface between the core 5 and the cladding 6.
