LID MEMBER AND SEALED CONTAINER INCLUDING THE SAME

PROBLEM TO BE SOLVED: To provide a lid member capable of stabilizing its peel strength with a simple structure and a sealed container including the same.SOLUTION: The lid member 3 is configured by sequentially stacking a base material layer 5, a middle layer 6, and a thermoplastic resin layer 7, and the surface of the thermoplastic resin layer 7 is located to face the flange part 2a of a sealed container 2 to be thermally bonded. The thermoplastic resin layer 7 is formed into a five-layer structure where a first polyolefin layer 8, a first adhesive resin layer 9a, an EVOH layer 10, a second adhesive resin layer 9b, and a second polyolefin layer 11 are sequentially stacked from the side facing to the middle layer 6. By setting the peel strength of the first adhesive resin layer 9a with respect to the EVOH layer 10 smaller than that of the second adhesive resin layer 9b, peeling is enabled between the first adhesive resin layer 9a and the EVOH layer 10.