To prevent slip of a document from being generated and correctly carry the document to a readout position by controlling to be able to prevent carrying force from being added in the direction of obstructing carry against the document carrying direction, when a document carried out from a contact glass is turned over to be carried to the contact glass.

A document is one by one separated from a document bundle placed on the document tray 4 of a copying machine 1 to be carried on the contact glass 2 side. The document is stopped on the readout position on the contact glass 2, and the document completing readout is carried out on the turn-over paper discharge means 7 side by a carrying belt means 6. In this case, during a fixed time since the extreme end of the document is detected by a document detecting means (turn-over sensor) 31, the carrying belt means 6 positioned on the turn-over paper discharge means 7 side is controlled so as to be separated from the surface of the contact glass 2. Hereby, when the carried out document is turned over and sent back to the contact glass 2, carrying force is prevented from being added in the direction of obstructing carry.