An image reading apparatus includes a scanner housing, a document support member supported by the scanner housing, a reader configured to read an image of a document supported on a document support surface of the document support member, a movable member holding the reader, and a flat cable connected to the reader at one end. The scanner housing includes a peripheral wall including a particular wall. The particular wall includes a restricting portion protruding from the particular wall in a first direction parallel to the document support surface such that the restricting portion restricts the facing surface of the flat cable from contacting the flat surface of the document support member by contacting an outer portion of the facing surface of the flat cable. The restricting portion includes a restricting surface located closer to a bottom wall surface of the scanner housing than the document support member.