An image reading apparatus includes a reading unit that, after reading an image of a first side of a first document and an image of a first side of a second document, reads an image of a second side of the first document and an image of a second side of the second document, and an output unit configured to output the image of the first side of the first document read by the reading unit, store the image of the second side of the first document read by the reading unit in a storage unit, and after outputting the image of the first side of the second document read by the reading unit, output the image of the second side of the first document stored in the storage unit, and output the image of the second side of the second document read by the reading unit.