PURPOSE: To simplify the production of a document or the trial print under replacement, by printing the document held by a holding means in case a printing indication is given during production of the document.

CONSTITUTION: With a push of a print indication key 5a while a document is produced or replaced, a CPU 7 changes a program changeover switch 11 toward a print program 10b and at the same time confirms that a flag region 9 is in a print mode. Then the document stored in a document producing region 12 of a memory part 8', i.e., a document under production or replacement is transferred to a printer 6 and printed. The document producing device is reset to a mode shown at the region 9 as soon as the printing is over and is ready for reproduction or replacement of documents. The CPU 7 transfers the document to a document floppy disk 3a for registration and storage at a time point when the key operation of a keyboard 5' is over. Then the CPU 7 clears the flag of the region 9 and is set in a waiting state.