Can lid

To provide a can lid having both excellent explosion-proof functionality and tapping suitability. A buckling-inducing part 9 allowing simple angle-forming deformation is formed at a plurality of points on the periphery of a panel part 3. A score line 12 is formed, which intersects an imaginary line L1 connecting the centre of the panel part 3 and a centre section of the buckling-inducing part 9. Both ends 12a of the score line 12 are positioned beyond an imaginary boundary line L2, which is perpendicular to the imaginary line L1, on the centre side of the panel part 3. Furthermore, a circular recess is formed in a middle section of the panel part 3, a portion between the buckling-inducing part 9 and an interior side wall 7 in an annular groove is an inclined planar part 10, and the inclined planar part 10 and the interior side wall 7 are linked by an R part 11.