This cylindrical battery (10) comprises a bottomed cylindrical outer can (16), a wound electrode body (14) stored inside the outer can (16), a sealing body (17) which closes off an opening of the outer can (16), and an upper insulating plate (18) which is disposed inside the outer can (16) and is positioned between the sealing body (17) and the electrode body (14) in an axial direction. The upper insulating plate (18) has, on a lower surface (51) on the electrode body (14) side in the axial direction, an annular first groove, and a plurality of second grooves extending from the radially inside to the outside in the substantially radial direction toward the first groove side.