A collation device comprising: a light source unit; a camera unit that receives light emitted from the light source unit and reflected in a collation area of an object to acquire a photographed image of the collation area; a display unit; and a processor configured to, by executing a program: detect a bright spot portion of the light emitted from the light source unit from the photographed image obtained from the camera unit; the collation device being characterized in that the processor is further configured to, by executing a program: display a guide for indicating an irradiation direction of the light on a plane on the display unit with respect to the collation area, in a case where a surface of the collation device provided with the light source unit and the camera unit and the object are substantially parallel; detect a distance between the light source unit and the camera unit by using a position of the bright spot portion from the photographed image; and notify of a collation result between a registered image prepared in advance in the same positional relationship as the positional relationship as instructed by the guide and the photographed image photographed in accordance with the distance. a light source unit; a camera unit that receives light emitted from the light source unit and reflected in a collation area of an object to acquire a photographed image of the collation area; a display unit; and a processor configured to, by executing a program: detect a bright spot portion of the light emitted from the light source unit from the photographed image obtained from the camera unit; the collation device being characterized in that the processor is further configured to, by executing a program: display a guide for indicating an irradiation direction of the light on a plane on the display unit with respect to the collation area, in a case where a surface of the collation device provided with the light source unit and the camera unit and the object are substantially parallel; detect a distance between the light source unit and the camera unit by using a position of the bright spot portion from the photographed image; and notify of a collation result between a registered image prepared in advance in the same positional relationship as the positional relationship as instructed by the guide and the photographed image photographed in accordance with the distance. detect a bright spot portion of the light emitted from the light source unit from the photographed image obtained from the camera unit; the collation device being characterized in that the processor is further configured to, by executing a program: display a guide for indicating an irradiation direction of the light on a plane on the display unit with respect to the collation area, in a case where a surface of the collation device provided with the light source unit and the camera unit and the object are substantially parallel; detect a distance between the light source unit and the camera unit by using a position of the bright spot portion from the photographed image; and notify of a collation result between a registered image prepared in advance in the same positional relationship as the positional relationship as instructed by the guide and the photographed image photographed in accordance with the distance. display a guide for indicating an irradiation direction of the light on a plane on the display unit with respect to the collation area, in a case where a surface of the collation device provided with the light source unit and the camera unit and the object are substantially parallel; detect a distance between the light source unit and the camera unit by using a position of the bright spot portion from the photographed image; and notify of a collation result between a registered image prepared in advance in the same positional relationship as the positional relationship as instructed by the guide and the photographed image photographed in accordance with the distance.