An image forming machine comprising a host computer, a printer, a copying machine, and a document supply device for conveying a document printed by the printer to document stand means of an automatic document feeder of the copying machine is disclosed, the image forming machine including first document conveying means for directly conveying the document printed by the printer to the automatic document feeder, and second document conveying means which has an intermediate tray for temporarily storing the document printed by the printer and conveys this document to the automatic document feeder after temporarily storing it in the intermediate tray.