| 摘要 |
A concave portion (50) constructed by a circular hole is formed at a guide member (16) positioning a original on aboard surface (15) of an original table (14) by joining a surrounding edge portion of the original table (14) and attaching to the original. Concave portion image data displaying shadow of the concave portion (50) by reading shadow of the concave portion (50) at a scanning portion is produced, and an origin of original image data corresponding to a reading origin (47) on the board surface (15) by a control portion is set to the scanning portion based on the concave portion image data.
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