A paper lid mainly made of paper, the paper lid comprising: a top plate portion , extending in a first direction (X1); an inner fitting portion , provided along a circumferential direction of the top plate portion , extending in a second direction (Z2), which intersects the first direction (X1), and being continuous with the top plate portion ; a peak portion , provided along the circumferential direction of the inner fitting portion , extending in a third direction (X3), which intersects the second direction (Z2), and being continuous with the inner fitting portion ; an outer fitting portion , provided along the circumferential direction of the peak portion , extending in a fourth direction (Z4), which intersects the third direction (X3), facing the inner fitting portion at a distance, and being continuous with the peak portion ; and a flange portion , provided along the circumferential direction of the outer fitting portion , extending in a fifth direction (X5), which intersects the fourth direction (Z4), being continuous with the outer fitting portion , and including an end of the paper lid , wherein an inner-surface side of the inner fitting portion has a wrinkle-free range from an edge of the top plate portion in the second direction (Z2), and has wrinkles beyond this range, characterized in that there are no wrinkles in the inner surface of the inner fitting portion intended to contact the inner peripheral surface of the container portion of the paper container at least within a range of 3 mm from the top plate portion in the second direction (Z2), and has wrinkles from 3 mm and beyond, wherein the peak portion and a tip of the flange portion has wrinkles . a top plate portion , extending in a first direction (X1); an inner fitting portion , provided along a circumferential direction of the top plate portion , extending in a second direction (Z2), which intersects the first direction (X1), and being continuous with the top plate portion ; a peak portion , provided along the circumferential direction of the inner fitting portion , extending in a third direction (X3), which intersects the second direction (Z2), and being continuous with the inner fitting portion ; an outer fitting portion , provided along the circumferential direction of the peak portion , extending in a fourth direction (Z4), which intersects the third direction (X3), facing the inner fitting portion at a distance, and being continuous with the peak portion ; and a flange portion , provided along the circumferential direction of the outer fitting portion , extending in a fifth direction (X5), which intersects the fourth direction (Z4), being continuous with the outer fitting portion , and including an end of the paper lid , wherein an inner-surface side of the inner fitting portion has a wrinkle-free range from an edge of the top plate portion in the second direction (Z2), and has wrinkles beyond this range, characterized in that there are no wrinkles in the inner surface of the inner fitting portion intended to contact the inner peripheral surface of the container portion of the paper container at least within a range of 3 mm from the top plate portion in the second direction (Z2), and has wrinkles from 3 mm and beyond, wherein the peak portion and a tip of the flange portion has wrinkles . <EOS>