An image reading apparatus includes: a transport unit; a first reading unit which reads one surface of a document transported by the transport unit and generates first read data of a front end portion or a rear end portion of the one surface of the document; a second reading unit which reads the other surface of the document transported by the transport unit and generates second read data of a front end portion or a rear end portion of the other surface of the document; an edge detection unit which performs edge detection processing on each of the first read data and the second read data; and a determination unit which determines that there is double feeding of documents by the transport unit when the edge detection unit detects a plurality of edges from at least either the first read data or the second read data.