An image reading apparatus includes a document feeder; a platen; an image reader configured to read the document, fed by the document feeder, through the platen; a memory; and a controller. The controller causes the image reader to read a reference plate at a predetermined reading position to generate read data, and detecting whether the read data has an abnormality; when the read data has the abnormality, stores a detection position; sets a reading position of the image reader in the sub-scanning direction to a set position spaced by a predetermined range or more from the detection position; when instruction to start reading is received, moves the image reader under standby at a standby position to arrange the image reader at the set position; and reads the document, fed by the document feeder, by the image reader.

The usability in a case where a combined image, which is obtained by integrating two scanned images of a specific original, is generated is improved. An image formation apparatus includes: an obtainment unit configured to obtain two cropped images by performing cropping processing on two scanned images corresponding to two original surfaces that are obtained by scanning a specific original; and a generation unit configured to generate a combined image, which is obtained by integrating the two cropped images obtained by the obtainment unit.