A can lid and a can barrel comprising: a panel attached to an aperture of the can barrel; a tab including a first end section and a second end section, a portion of which positioned between the first end section and the second end section being fastened to the panel by a rivet, and pressing a predetermined pressed location of the panel with the second end section; and a score line formed on the panel, which includes a first portion that passes one side of the tab to head toward the first end section side of the tab, a second portion that passes the other side of the tab to head toward the first end section side of the tab, and a third portion that is formed to connect the first portion and the second portion and passes outside of an outer peripheral edge of the tab on the second end section side of the tab, wherein each of the first portion and the second portion heading toward the first end section side is formed to reach any one of a location where the first end section is positioned and a location positioned beside the first end section, wherein the tab is attached to, of an outer surface and an inner surface of the panel, the outer surface side, wherein due to breakage of the panel on the score line, a tongue-shaped portion that is configured with part of the panel and formed into a tongue-shape is generated, wherein the tongue-shaped portion is bent toward the inner surface side of the panel by an operation of the tab by an operator, wherein the tab is moved with the tongue-shaped portion to the inner surface side of the panel, characterized in that in a state in which the tab has been moved to the inner surface side of the panel, the first end section of the tab is not positioned on the inner surface side, but is positioned on the outer surface side. a panel attached to an aperture of the can barrel; a tab including a first end section and a second end section, a portion of which positioned between the first end section and the second end section being fastened to the panel by a rivet, and pressing a predetermined pressed location of the panel with the second end section; and a score line formed on the panel, which includes a first portion that passes one side of the tab to head toward the first end section side of the tab, a second portion that passes the other side of the tab to head toward the first end section side of the tab, and a third portion that is formed to connect the first portion and the second portion and passes outside of an outer peripheral edge of the tab on the second end section side of the tab, wherein each of the first portion and the second portion heading toward the first end section side is formed to reach any one of a location where the first end section is positioned and a location positioned beside the first end section, wherein the tab is attached to, of an outer surface and an inner surface of the panel, the outer surface side, wherein due to breakage of the panel on the score line, a tongue-shaped portion that is configured with part of the panel and formed into a tongue-shape is generated, wherein the tongue-shaped portion is bent toward the inner surface side of the panel by an operation of the tab by an operator, wherein the tab is moved with the tongue-shaped portion to the inner surface side of the panel, characterized in that in a state in which the tab has been moved to the inner surface side of the panel, the first end section of the tab is not positioned on the inner surface side, but is positioned on the outer surface side.