An easily openable container lid for a container having a cylindrical mouth-neck section having an annular locking ridge formed in an upper end part of an outer peripheral surface thereof, comprising: a shell including a circular top panel wall , a skirt wall extending from a peripheral edge of the top panel wall arcuately in a radially outward and downward direction and then extending downwardly vertically, in a vertical sectional view, and a gripping piece extending out from a lower end of the skirt wall , wherein the top panel wall , the skirt wall , and at least a base of the gripping piece are integrally formed from a metallic sheet, and the shell is formed with a pair of scores having first portions (20a-1, 20b-1) extending upwardly on the skirt wall from both sides of the gripping piece , and second portions (20a-2, 20b-2) continuous with the first portions (20a-1, 20b-1) and extending arcuately at an upper end of the skirt wall or the peripheral edge of the top panel wall ; and a disk-shaped synthetic resin liner formed by embossing a synthetic resin material on an inner surface of the top panel wall of the shell , characterised in that the liner is adhered over an entire surface thereof to the inner surface of the top panel wall , at least the second portions (20a-2, 20b-2) of the pair of scores are formed by forming grooves on an inner surface side of the shell , and are extended along a peripheral edge of the liner radially outwardly of the liner , and the liner has a thin-walled central section and a thick-walled peripheral edge section , and has a downwardly protruding outer ridge formed in a radially outward region of the thick-walled peripheral edge section , the thin-walled central section of the liner has a thickness of 0.15 to 0.30 mm, and the thick-walled peripheral edge section has a thickness of 0.45 to 0.75 mm, wherein a downwardly protruding inner ridge is formed in a radially inward region of the thick-walled peripheral edge section of the liner . a shell including a circular top panel wall , a skirt wall extending from a peripheral edge of the top panel wall arcuately in a radially outward and downward direction and then extending downwardly vertically, in a vertical sectional view, and a gripping piece extending out from a lower end of the skirt wall , a circular top panel wall , a skirt wall extending from a peripheral edge of the top panel wall arcuately in a radially outward and downward direction and then extending downwardly vertically, in a vertical sectional view, and a gripping piece extending out from a lower end of the skirt wall , wherein the top panel wall , the skirt wall , and at least a base of the gripping piece are integrally formed from a metallic sheet, and the shell is formed with a pair of scores having first portions (20a-1, 20b-1) extending upwardly on the skirt wall from both sides of the gripping piece , and second portions (20a-2, 20b-2) continuous with the first portions (20a-1, 20b-1) and extending arcuately at an upper end of the skirt wall or the peripheral edge of the top panel wall ; and a disk-shaped synthetic resin liner formed by embossing a synthetic resin material on an inner surface of the top panel wall of the shell , characterised in that the liner is adhered over an entire surface thereof to the inner surface of the top panel wall , at least the second portions (20a-2, 20b-2) of the pair of scores are formed by forming grooves on an inner surface side of the shell , and are extended along a peripheral edge of the liner radially outwardly of the liner , and <EOS>