PURPOSE: To make it possible to easily and inexpensively perform the soiling prevention and the soling elimination of reading stage parts, regarding the reading stages of various kinds of readers reading originals optically and converting them into electric signals.

CONSTITUTION: A white pressing surface 12b to be the slice level setting reference of image information and a back part make a tongue piece having semicylindrical weight part 12a project so as to be bendable freely. This stage is composed of an upper side guide 12 laterally supported the carrier roller 4-2 of an original 1 and the upper side of an ejection roller 4-3 via the weight part 12a and a lower side guide 3 laterally supported the carrier roller 4-2 on the lower side and the ejection roller 4-3 by fixing a light source 6-1 on the lower part by mounting a transparent transmission plate 3-1 on the opening part of the location corresponding to this pressing surface 12b. At this point, the carrier route of the original 1 is formed by performing pressure welding for the upper and lower carrier rollers 4-2 and the ejection roller 4-3, the pressing surface 12 is allowed to contact with the transmission plate 3-1, and light is made to enter into an image sensor by irradiating the image information of the original 1 with light from the light source 6-1.