PURPOSE: To easily and surely remove only a punching remainder material which is a non-wiring pattern part, in manufacture or the like of a flat wiring body.

CONSTITUTION: Conductor foil 12 is laminated on a surface 4a of a carrier tape 4 through a sticking layer 6, and further the conductor foil 12 is punched to prepare a band-shaped material 17 divided into a wiring pattern part 15 and a non-wiring pattern part 16 which must be removed. This band-shaped material 17 is given a feed intermittently in the lengthwise direction, to stick a reverse surface 4b of the carrier tape 4 to a porous sticking flat plate 26, to also heat by a heater 19 from a side of the reverse surface 4b, and the sticking layer 6 is softened to separate the non-wiring pattern part 16 of the conductor foil 12, while curved, from the band-shaped material 17 (carrier tape 4) (to B direction). By this method, since the band-shaped material 17 can be maintained in a flat plane shape to the porous sticking flat plate 26, to enable sticking force of the sticking layer 6 to decrease by heating, only the non-wiring pattern part 16 can be easily and surely separated to be removed from the band-shaped material 17.