Provided is a method for manufacturing a pillows-type packaging bag, which makes it hard to tear even if a film has a notch in a packaging line of the pillows-type packaging bag, and which improves manufacturing efficiency. The method for manufacturing the pillow-type packaging bag 7 having the tearing line 11 for opening is characterized by sending out the long film 1, forming the tearing line 11 on the film 1, conveying the film 1 while sucking it to the conveying belt 3, and thermally bonding the film 1 to package the object 5 to be packaged. Figure 2
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