PURPOSE: To obtain specifications for dividing a printed wiring board such that a coupling part is left at all times on a fixed side printed wiring board when one printed circuit board, formed through the finally removed coupling part, is divided from a plurality of printed wiring boards.

CONSTITUTION: One printed wiring board is divided from a plurality of coupled printed boards such that a finally removed coupling part 4 is left at all times on a fixed side printed wiring board by varying the strength (number) of perforations 23, 24 at the coupling part 4 of printed wiring boards. Since the finally removed coupling part is left at all times on a fixed side printed wiring board, the efficiency is enhanced in the work for removing the coupling part.