<p>Provided is a beverage can cover, which is so excellent in pressure strength as satisfies a predetermined pressure requirement merely by gauging it down simply. An annular groove portion (10) of a can cover is formed to have such sectional shapes that a panel wall portion (3) is connected to a chuck wall radius portion (4) so that a tangential line at a second contact point (e2) may be perpendicular to the axial directions of a center panel portion (1), that a chuck wall portion (5) continues to the chuck wall radius portion (4) so that a tangential line at a first contact point (e1) may be inclined to the radially inner side (or inclined clockwise by ?1) and is bent with a radius (R1) (as will be called the "first radius portion (5a)") at a position (h1) from the lowermost point of the chuck wall radius portion (4) so that it may be folded to the radially outer side.</p>
