A copying machine with an ADF has a "two-in-one mode" which is a function to copy images of two sheets of a document set side by side on the platen on a surface of a copy paper with a single scanning process. As document sheets are stored on the document tray facing down, the last page of the document is copied first and the first page of the document is copied last. In the case that odd numbers of document sheets are copied, a blank page interrupts between page 1 and page 2 when the copied papers are bound into a book. This invention provides a copying machine by which a user can select the position of the copied image of the first page or the last sheet of a document on a copy paper.