An aseptic pillow packaging bag and a laminated resin film that can be preferably used to produce the packaging bag. The laminated resin film includes a center layer that has a first surface provided with an inner surface layer, and a second surface provided with an outer surface layer. In the laminated resin film, the inner surface layer is a first multilayer film made of linear low density polyethylene, including two or more films selected from C6L-LDPE and/or C8L-LDPE, the center layer is a nylon-based film, or a barrier nylon film, and the outer surface layer is formed by laminating a medium density polyethylene film onto a low density polyethylene film or a medium density polyethylene film with a nylon film interposed therebetween.