An image reading apparatus comprising: a transport section configured to transport original documents along a transport path; a reading section configured to read images of the original documents transported by the transport section; a placement detection section for detecting the original document mounted on an original support; a transport sensor for detecting the original documents transported by the transport section; an output controller configured to output data of the original documents read by the reading section; a multi-sheet feed detection section configured to detect a multi-sheet feed of the original documents transported by the transport section, wherein the image reading apparatus is adapted to interrupt a job in response to detection of a multi-sheet feed by the multi-sheet feed detection section, the job comprising sequentially transporting a plurality of original documents to perform a reading operation to read images; and an instruction section configured to issue an instruction to disable multi-sheet feed detection by the multi-sheet feed detection section, wherein the output controller outputs first data that is read in a reading operation before a job for sequentially transporting a plurality of original documents to perform the reading operation to read images is interrupted by multi-sheet feed detection performed by the multi-sheet feed detection section, and second data that is read in the reading operation after the job is restarted in a disabling mode in which the multi-sheet feed detection is disabled in accordance with an instruction from the instruction section, the first data and the second data being output wherein the first data and the second data are saved as a single file. a transport section configured to transport original documents along a transport path; a reading section configured to read images of the original documents transported by the transport section; a placement detection section for detecting the original document mounted on an original support; a transport sensor for detecting the original documents transported by the transport section; an output controller configured to output data of the original documents read by the reading section; a multi-sheet feed detection section configured to detect a multi-sheet feed of the original documents transported by the transport section, wherein the image reading apparatus is adapted to interrupt a job in response to detection of a multi-sheet feed by the multi-sheet feed detection section, the job comprising sequentially transporting a plurality of original documents to perform a reading operation to read images; and an instruction section configured to issue an instruction to disable multi-sheet feed detection by the multi-sheet feed detection section, wherein the output controller outputs first data that is read in a reading operation before a job for sequentially transporting a plurality of original documents to perform the reading operation to read images is interrupted by multi-sheet feed detection performed by the multi-sheet feed detection section, and second data that is read in the reading operation after the job is restarted in a disabling mode in which the multi-sheet feed detection is disabled in accordance with an instruction from the instruction section, the first data and the second data being output wherein the first data and the second data are saved as a single file. first data that is read in a reading operation before a job for sequentially transporting a plurality of original documents to perform the reading operation to read images is interrupted by multi-sheet feed detection performed by the multi-sheet feed detection section, and second data that is read in the reading operation after the job is restarted in a disabling mode in which the multi-sheet feed detection is disabled in accordance with an instruction from the instruction section, the first data and the second data being output wherein the first data and the second data are saved as a single file.