Abstract: A configuration that enables easy implementation of wiping disinfection for a gripping handle for which an operating means is provided. The gripping handle, which is grasped by an operator, is formed as part of the lower case including part of the housing. The gripping handle is provided with an operating surface portion that the operator touches when initiating the reading process. There is a site on the inner side of the gripping handle, wherein the site is opposed to the operating surface portion. At this site on the inner surface side, a detector is provided to detect the state in which the operating surface portion is touched.