To provide a can cover which is surely fitted to a can and can be easily fixed to or removed from the can, and which prevents the content from spilling out in the vicinity even if the can falls down in a state where the content is left in the can.

The cover is a plastic cover laying over the upper part of the can body which is double seamed with an easily openable can cap. The cover is characterized by circumferentially contacting with the easily openable can cap, at least from a chuck wall part to a chuck wall radius part of the double seamed part.