The present invention addresses the problem of providing: a laminate that has excellent lamination strength and that is provided with a heat-sealable resin layer and a polyester film having a furandicarboxylic acid unit; and a packaging bag provided with the laminate. This laminate is provided with a heat-sealable resin layer and a polyester film and is characterized in that the polyester film isa biaxially oriented polyester film containing a polyethylene furandicarboxylate resin comprising furandicarboxylic acid and ethylene glycol, the planar orientation coefficient deltaP of the film is 0.005-0.200, the film has a thickness of 1-300 [mu]m, the thermal shrinkage rate of the film when treated for 30 minutes at 150 DEG C is 10% or less, and the lamination strength of the laminate is 2.0N/15 mm or more.