A sealed container, a packing, and packing-equipped lid body

A packing for being attached to a ceiling-equipped cylindrical lid body which is to be attached to an opening of a bottomed cylindrical container body, said packing comprising:

• a packing body to be provided in the lid body;
• three flexible ring-shaped protrusions provided on the packing body which are mutually separated in the axial direction of the lid body and protruding in a radial direction, wherein
• the three ring-shaped protrusions have the diameters of their outer peripheral portions to be smaller towards a top plate portion of the lid body,
• when the lid body with the packing has been attached to the opening of the container body, the outer peripheral portion of one of the ring-shaped protrusions, which is farthest from the top plate portion of the lid body in the axial direction, is in close contact with the inner peripheral surface of the container body, and other ring-shaped protrusions have their outer peripheral portions to be radially separated from the inner peripheral surface of the container body and to be located radially outwardly beyond the tip edge of the ring-shaped overhanging portion, which has been formed protruding radially inwardly in the opening edge portion of the container body.