To solve a problem that a conventional cover film reliably holds an object to be stored, and firmly fixes the object accordingly; and the cover film is hardly peeled when taking out the object by peeling the cover film; naturally the cover film is peeled by a large force, thus, the object may be dropped or defective peeling by a machine can occur.

In a cover film for a packaging container, a polyester resin film which is a base film layer, a polyolefin film which is an intermediate layer, and an adhesive film which is an adhesive layer with a melting point of ≤150°C are laminated in this order. The polyester resin film is ≤18 μm thick, and the haze value is ≤0.95, and the breaking strength is ≥260 MPa. The polyolefin film is formed of a low-density polyethylene with a density of ≤0.925 g/cm3.