Provided is a fitting adjustment structure for a lid in which, before a frame and a lid are incorporated into an opening portion, a height of a stopper can be adjusted with the lid being closed, to thereby eliminate the need for adjustment after the incorporation. The fitting adjustment structure for the lid includes: the opening portion formed on a panel; the lid which turns to open and close the opening portion; and the frame which is placed along a periphery of the opening portion, and supports the lid, in which: a screw hole is pierced in the frame; a stopper having an upper surface which abuts against a rear surface of the lid in a closed state is screwed with the screw hole; and a turning operation portion engageable with a rotating tool is provided at a lower end of the stopper.