To provide a film square-bottom pillow packaging bag which decreases an environmental load by employing a film as a packaging material of a product in place of a sheet, to reduce cost and the amount of resin, easily enables self-standing owing to a square bottom, improves misregistration and distortion during printing, ensures excellent design, and reduces the number of assembling processes, and to provide a manufacturing method of the same.

A film square-bottom pillow packaging bag is a film packaging bag formed of a heat sealable film material. H-shaped heat seal lines are formed on a pair of facing surfaces of the film packaging bag. One of the H-shaped heat seal lines is formed of a film tube heat seal line formed at a position crossing the center part of the facing surfaces, and a cut heat seal line which is formed at a position of an end edge of the film tube heat seal line, i.e., at the position of the end edge of the facing surfaces.