Disclosed is an apparatus for attaching and detaching a cover of a bait casting reel piezoelectric drive circuit. The apparatus includes a reel main body which is formed with an opening portion on one side, and inside which a spool is rotatably installed a reel cover which supports the rotation of the spool, and opens and closes the opening portion by horizontally moving from one side of the reel main body so that the spool is separated from the reel main body and a holder which connects the reel main body with the reel cover, projects from the reel main body to guide an opening and closing path of the reel cover when the opening portion is opened, and is coupled with the reel cover by a magnetic body internally provided to fix a separation position of the reel cover.
