An image reading apparatus includes a reading unit configured to read an original document to generate image data, a first file generation unit configured to generate a first file based on first image data that is generated by reading a first original document using the reading unit, a second file generation unit configured to generate a second file based on second image data that is generated by reading a second original document using the reading unit, and an attaching unit configured to attach the second file to the first file, wherein the reading unit reads the second original document after reading the first original document.