A film feeding device (2) has two film holders (22a, 22b) for supporting two rolled films as a use side film (101) and a standby side film (100), respectively; a feeding roller (3) for paying out theuse side film (101); a film pressing member (34) for holding the starting end of the standby side film (100); a suction device (36) for pulling back the standby side film (100) to the upstream side ina pay out direction; and a heater bar (31) for fusion bonding the two films (100, 101). The suction device (36) sucks and holds the film (100) and pulls it back to a position where the starting end of the film (100) faces the heater bar (31).